Smoothing transformation and spline collocation for weakly singular Volterra integro-differential equations
          Diogo, Teresa; Lima, Pedro M.; Pedas, Arvet; Vainikko,Gennadi  
          
          Applied Numerical Mathematics, 114  (2017), 63–76  
           https://doi.org/10.1016/j.apnum.2016.08.009  
           
            
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