@article{04212390, title = {Some sufficient conditions for univalence.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {14}, year = {1991}, pages = {619-623}, doi = {10.1155/S0161171291000856}, zbl = {0733.30012}, language = {en}, url = {http://dml.mathdoc.fr/item/04212390} }
Singh, Sukhjit. Some sufficient conditions for univalence.. International Journal of Mathematics and Mathematical Sciences, Tome 14 (1991) pp. 619-623. doi : 10.1155/S0161171291000856. http://gdmltest.u-ga.fr/item/04212390/