@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] Modern Analysis, Cambridge, 1935, p. 418.
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