@article{GDZPPN002434245, title = {D+-Stable Dynamical Systems on 2-Manifolds.}, journal = {Mathematische Zeitschrift}, volume = {194}, year = {1987}, pages = {453-462}, zbl = {0603.58008}, url = {http://dml.mathdoc.fr/item/GDZPPN002434245} }
Athanassopoulos, Konstantin. D+-Stable Dynamical Systems on 2-Manifolds.. Mathematische Zeitschrift, Tome 194 (1987) pp. 453-462. http://gdmltest.u-ga.fr/item/GDZPPN002434245/