@article{1077476113,
author = {Doyle, Thomas C.},
title = {Invariant theory of the general ordinary, linear, homogeneous,
second order, differential boundary problem},
journal = {Duke Math. J.},
volume = {17},
number = {1},
year = {1950},
pages = { 249-261},
language = {en},
url = {http://dml.mathdoc.fr/item/1077476113}
}
Doyle, Thomas C. Invariant theory of the general ordinary, linear, homogeneous,
second order, differential boundary problem. Duke Math. J., Tome 17 (1950) no. 1, pp. 249-261. http://gdmltest.u-ga.fr/item/1077476113/