@article{1183498781, author = {Carmichael, R. D.}, title = {Linear differential equations of infinite order}, journal = {Bull. Amer. Math. Soc.}, volume = {42}, number = {12}, year = {1936}, pages = { 193-218}, language = {en}, url = {http://dml.mathdoc.fr/item/1183498781} }
Carmichael, R. D. Linear differential equations of infinite order. Bull. Amer. Math. Soc., Tome 42 (1936) no. 12, pp. 193-218. http://gdmltest.u-ga.fr/item/1183498781/