@article{BUMI_1957_3_12_1_12_0,
author = {Richard Bellman},
title = {On the linear differential equations whose solutions are the products of solutions of two given linear differential equations.},
journal = {Bollettino dell'Unione Matematica Italiana},
volume = {12},
year = {1957},
pages = {12-15},
zbl = {0077.29101},
mrnumber = {86960},
language = {en},
url = {http://dml.mathdoc.fr/item/BUMI_1957_3_12_1_12_0}
}
Bellman, Richard. On the linear differential equations whose solutions are the products of solutions of two given linear differential equations.. Bollettino dell'Unione Matematica Italiana, Tome 12 (1957) pp. 12-15. http://gdmltest.u-ga.fr/item/BUMI_1957_3_12_1_12_0/
[1] Comptes Rendus, XCI (1880). pp. 211-214.
[2] and , Modern Analysis, Cambridge, 1935, p. 418.