@article{1028999308,
author = {Bhatia, Nam P. and Lakshmikantham, V.},
title = {An extension of Lyapunov's direct method.},
journal = {Michigan Math. J.},
volume = {12},
number = {1},
year = {1965},
pages = { 183-191},
language = {en},
url = {http://dml.mathdoc.fr/item/1028999308}
}
Bhatia, Nam P.; Lakshmikantham, V. An extension of Lyapunov's direct method.. Michigan Math. J., Tome 12 (1965) no. 1, pp. 183-191. http://gdmltest.u-ga.fr/item/1028999308/