@article{02163617,
title = {Focal decompositions for linear differential equations of the second order.},
journal = {Abstract and Applied Analysis},
volume = {2003},
year = {2003},
pages = {813-821},
doi = {10.1155/S1085337503212057},
zbl = {1080.34513},
language = {en},
url = {http://dml.mathdoc.fr/item/02163617}
}
Birbrair, L.; Sobolevsky, M.; Sobolevskii, P. Focal decompositions for linear differential equations of the second order.. Abstract and Applied Analysis, Tome 2003 (2003) pp. 813-821. doi : 10.1155/S1085337503212057. http://gdmltest.u-ga.fr/item/02163617/