@article{1102994975, author = {Helton, Burrell W.}, title = {Integral equations and product integrals.}, journal = {Pacific J. Math.}, volume = {19}, number = {3}, year = {1966}, pages = { 297-322}, language = {en}, url = {http://dml.mathdoc.fr/item/1102994975} }
Helton, Burrell W. Integral equations and product integrals.. Pacific J. Math., Tome 19 (1966) no. 3, pp. 297-322. http://gdmltest.u-ga.fr/item/1102994975/