@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/