@article{1028998277, author = {Melzak, Z. A.}, title = {The positivity sets of the solutions of a transport equation.}, journal = {Michigan Math. J.}, volume = {6}, number = {1}, year = {1959}, pages = { 331-334}, language = {en}, url = {http://dml.mathdoc.fr/item/1028998277} }
Melzak, Z. A. The positivity sets of the solutions of a transport equation.. Michigan Math. J., Tome 6 (1959) no. 1, pp. 331-334. http://gdmltest.u-ga.fr/item/1028998277/