Papers in International Journals

• Fountain, John; Gomes, Gracinda M. S.; Gould, Victoria (1999) Enlargements, semiabundancy and unipotent monoids Comm. Algebra: 27 (2), 595-614.

• Bentz, Wolfram; Bulman-Fleming, Sydney (1999) On Equalizer-flat Acts Semigroup Forum: 58, 5 – 16.

• Gomes, Gracinda M. S.; Gould, Victoria (1999) Proper weakly left ample semigroups Internat. J. Algebra Comput.: 9 (6), 721-739.

• Bentz, Wolfram (1999) Topological Implications in Varieties Algebra Universalis: 42, 9 – 16.

• Galvão, M. Luísa; Smith, Patrick F. (1998) Chain Conditions in Modular Lattices Colloquium Mathematicum: 76 (1), 85-98.

• Bordalo, Gabriela Hauser; Rodrigues, Elias (1998) Complements in modular and semimodular lattices Portugaliae Math.: 55 (3), 373-380.

• Santa-Clara, Catarina (1998) Extending modules with injective or semisimple summands J. Pure Applied Algebra: 127, 193-203.

• Berman, Joel; Bordalo, Gabriela Hauser (1998) Finite distributive lattices and doubly irreducible elements Discrete Mathematics: 178, 237-243.

• Gomes, Gracinda M. S.; Szendrei, Mária B. (1998) Idempotent pure extensions of inverse semigroups via quivers J. Pure Applied Algebra: 127, 15-38.

• Santa-Clara, Catarina; Silva, F. C. (1998) On infinite Goldie dimension J. Algebra: 205, 617-625.

• Gouveia, M. J.; (previously Saramago, M. J.) (1998) Optimal natural dualities for some quasivarieties of distributive double p-algebras Acta Math. Univ. Comenianae: 67, 249-272.

• Gomes, Gracinda M. S.; Howie, John M. (1998) Semigroups with zero whose idempotents form a subsemigroup Proc. Royal Soc. Edinburgh: 128A, 265-281.

• Bordalo, Gabriela Hauser; Silva, Ilda P. (1997) A characterization of finite modular pseudocomplemented lattices Discussiones Mathematicae: 17, 113-122.

• Branco, Mário J. J. (1997) The Kernel Category and Variants of the Concatenation Product Internat. J. Algebra Comput.: 7, 487-509.

• Gomes, Gracinda M. S.; Howie, John M. (1996) A P-theorem for inverse semigroups with zero Portugaliae Math.: 53 (3), 257-278.

• Santa-Clara, Catarina; Smith, Patrick F. (1996) Extending modules which are direct sums of injective modules and semisimple modules Comm. Algebra: 24 (11), 3641-3651.

• Bordalo, Gabriela Hauser; Monjardet, B. (1996) Reducible classes of finite lattices Order: 13, 379-390.

• Gomes, Gracinda M. S.; Howie, John M. (1995) Idempotent endomorphisms of an independence algebra of finite rank Proc. Edinb. Math. Soc.: 38, 107-116.

• Branco, Mário J. J. (1994) On the Pin-Thérien Expansion of Idempotent Monoids Semigroup Forum: 49, 329-334.

• Fountain, John; Gomes, Gracinda M. S. (1994) Proper left type-A covers Portugaliae Math.: 51 (4), 305-319.

• Bordalo, Gabriela Hauser; Priestley, H. A. (1994) Rees congruences in lattice-ordered algebras Publ. Math. Debrecen: 49, 355-364.

• Bordalo, Gabriela Hauser; Priestley, H. A. (1994) Series-Parallel posets and relative Ockham lattices Order: 11, 281-305.

• Gomes, Gracinda M. S. (1993) A characterisation of the group congruences on a semigroup Semigroup Forum: 46, 48-53.

• Fountain, J.B.; Gomes, Gracinda M. S. (1993) Proper left type-A monoids revisited Glasgow Math. J.: 35, 293-306.

• Gomes, Gracinda M. S. (1992) Group congruences on eventually inverse semigroup Portugal. Math.: 49 (4), 417-428.

• Fountain, J.B.; Gomes, Gracinda M. S. (1992) Left proper E-dense monoids J. Pure Appl. Algebra: 80, 1-27.

• Gomes, Gracinda M. S.; Howie, J.M. (1992) On the ranks of certain semigroups of order-preserving transformations Semigroup Forum: 45, 272-282.

• Fountain, J.B.; Gomes, Gracinda M. S. (1990) The Szendrei expansion of a semigroup Mathematika: 37, 251-260.

• Gomes, Gracinda M. S. (1988) Orthodox congruences on regular semigroups Semigroup Forum: 37, 149-166.

• Gomes, Gracinda M. S.; Howie, J.M. (1987) Nilpotents in finite symmetric inverse semigroups Proc. Edinburgh Math. Soc.: 30, 383-395.

• Gomes, Gracinda M. S.; Howie, J.M. (1987) On the ranks of certain finite semigroups of transformations Math. Proc. Cambridge Philos. Soc.: 101, 395-403.

• Gomes, Gracinda M. S. (1986) Some results on congruences on R-unipotent semigroups Semigroup Forum: 33, 175-185.

• Gomes, Gracinda M. S. (1986) The lattice of R-unipotent congruences on a regular semigroup Semigroup Forum: 33, 159-173.

• Gomes, Gracinda M. S. (1985) R-unipotent congruences on regular semigroups Semigroup Forum: 31, 265-280.

• Gomes, Gracinda M. S. (1983)  On left quasinormal orthodox semigroups Proc. Roy. Soc. Edinburgh: 95A, 59-71.

• Blyth, T. S.; Gomes, Gracinda M. S. (1983) On the compatibility of the natural order on a regular semigroup Proc. Roy. Soc. Edinburgh: 94A, 79-84.

• Galvão, M. Luísa (1978) Ideals in the semiring N Portugal. Math.: 37, no 1-2, 113-117.

• Galvão, M. Luísa (1978) Les relations de congruence sur le demianneau N des nombres naturels Period. Math. Hungar.: 9, no 3, 231-235.

• Almeida Costa, A.; Galvão, M. Luísa (1973) Sur les demianneaux réticulés Rev. Fac. Ciências de Lisboa: 2ª Série A, Vol XIV, Fasc 2º, 195-208.

• Almeida Costa, A.; Galvão, M. Luísa (1972) Sur les relations de invariance dans les treillis Rev. Fac. Ciências de Lisboa: 2ª Série A, Vol XIV, Fasc. 1º, 45-60.

• Galvão, M. Luísa (1960) Sur les ideaux réguliers d'un semianneau Rev. Fac. Ciências de Lisboa: 2ª Série A, Vol VIII, Fasc. 1º, 169-173.

• Galvão, M. Luísa (1959) On the theory of residuals Rev. Fac. de Ciências de Lisboa: 2ª Série A, Vol VII, 283-300.

• Araújo, João; Bentz, Wolfram; Gomes, Gracinda M. S. () Congruences on Direct Products of Transformation and Matrix Monoids  Semigroup Forum: (submitted).

Books

• Gomes, Gracinda M. S. (2011) Anéis e Corpos - uma introdução Textos de Matemática, DM-FCUL: 22.

• Gillibert, Pierre; Wehrung, F. (2011) From objects to diagrams for ranges of functors Lecture Notes in Mathematics Springer Berlin Heidelberg: 2029, ISBN: 978-3-642-21773-9.

Papers or Chapters in Edited Books

• Araújo, João; Cameron, Peter (2015) Permutation groups and transformation semigroups: results and problems  London Mathematical Society Lecture Note Series: 422, 128-141.

• Claudio, A. P.; Fonseca, S. ; Sequeira, Luís; Silva, I. P.  (2015) Shannon Switching Game and Directed Variants Dynamics, Games and Science. CIM Series in Mathematical Sciences: 1, 187-199.

• Couceiro, Miguel; Lehtonen, Erkko; Schölzel, Karsten (2013) Sur des classes de fonctions à seuil caractérisables par des contraintes relationnelles — On classes of threshold functions characterizable by relational constraints Actes des 22èmes rencontres francophones sur la Logique Floue et ses Applications (LFA 2013), Université de Reims Champagne-Ardenne, 145-152.

• Lehtonen, Erkko; Szendrei, Ágnes (2012) Partial orders induced by quasilinear clones Proceedings of the Salzburg Conference 2011 (AAA81), Verlag Johannes Heyn, Klagenfurt, 51-84.

• Couceiro, Miguel; Lehtonen, Erkko; Marichal, Jean-Luc; Waldhauser, Tamás (2011) An algorithm for producing median formulas for Boolean functions Proceedings of the Reed–Muller 2011 Workshop, Tampere International Center for Signal Processing (TICSP), 49-54.