@article{1102906600,
author = {Walker, Philip W.},
title = {A note on differential equations with all solutions of integrable-square.},
journal = {Pacific J. Math.},
volume = {61},
number = {2},
year = {1975},
pages = { 285-289},
language = {en},
url = {http://dml.mathdoc.fr/item/1102906600}
}
Walker, Philip W. A note on differential equations with all solutions of integrable-square.. Pacific J. Math., Tome 61 (1975) no. 2, pp. 285-289. http://gdmltest.u-ga.fr/item/1102906600/