@article{1028999427, author = {Levin, J. J. and Nohel, J. A.}, title = {Perturbations of a nonlinear Volterra equation.}, journal = {Michigan Math. J.}, volume = {12}, number = {1}, year = {1965}, pages = { 431-447}, language = {en}, url = {http://dml.mathdoc.fr/item/1028999427} }
Levin, J. J.; Nohel, J. A. Perturbations of a nonlinear Volterra equation.. Michigan Math. J., Tome 12 (1965) no. 1, pp. 431-447. http://gdmltest.u-ga.fr/item/1028999427/