@article{1183491954,
author = {Ritt, J. F.},
title = {On the integration in finite terms of linear differential equations of the second order},
journal = {Bull. Amer. Math. Soc.},
volume = {33},
number = {6},
year = {1927},
pages = { 51-57},
language = {en},
url = {http://dml.mathdoc.fr/item/1183491954}
}
Ritt, J. F. On the integration in finite terms of linear differential equations of the second order. Bull. Amer. Math. Soc., Tome 33 (1927) no. 6, pp. 51-57. http://gdmltest.u-ga.fr/item/1183491954/