@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/