@article{05379395,
title = {Necessary and sufficient conditions for a curve to be the gradient range of a },
journal = {Sibirskij Matematicheskij Zhurnal},
volume = {48},
year = {2007},
pages = {789-810},
zbl = {1164.26326},
language = {en},
url = {http://dml.mathdoc.fr/item/05379395}
}
Korobkov, M.V.; Panov, E.Yu. Necessary and sufficient conditions for a curve to be the gradient range of a . Sibirskij Matematicheskij Zhurnal, Tome 48 (2007) pp. 789-810. http://gdmltest.u-ga.fr/item/05379395/