@article{1250520070,
author = {Ishida, Hisashi},
title = {Weakly exact differentials on open Riemann surfaces},
journal = {J. Math. Kyoto Univ.},
volume = {30},
number = {4},
year = {1990},
pages = { 235-243},
language = {en},
url = {http://dml.mathdoc.fr/item/1250520070}
}
Ishida, Hisashi. Weakly exact differentials on open Riemann surfaces. J. Math. Kyoto Univ., Tome 30 (1990) no. 4, pp. 235-243. http://gdmltest.u-ga.fr/item/1250520070/