@article{GDZPPN002226138,
title = {Gradient-Like and Integrable Vector Fields on IR2.},
journal = {Manuscripta mathematica},
volume = {46},
year = {1984},
pages = {141-164},
zbl = {0564.58016},
url = {http://dml.mathdoc.fr/item/GDZPPN002226138}
}
Chicone, Carmen; Ehrlich, Paul. Gradient-Like and Integrable Vector Fields on IR2.. Manuscripta mathematica, Tome 46 (1984) pp. 141-164. http://gdmltest.u-ga.fr/item/GDZPPN002226138/