A note on Breda-Robertson's conjecture
          Avelino, Catarina P.; Santos, Altino F.   
          
          Journal of Pure and Applied Mathematics: Advances and Applications , 7(2) (2012), 73-82  
          http://scientificadvances.co.in/admin/img_data/551/images/[2]%20JPAMAA%200202009%20Catarina%20P.%20Avelino%20and%20Altino%20F.%20Santos%20[73-82].pdf  
           
          The continuous deformation of any spherical isometric folding into the standard spherical folding, fs, defined by fs (x, y, z) = (x, y, z ), remains an open problem since 1989. We show that this conjecture is restricted to the class of primitive foldings and it is exhibited a spherical folding within this class,
 where the difficulty of deformation is evidenced.  
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