@article{GDZPPN002438682,
title = {On the number of positive solutions of some weakly nonlinear equations on annular regions.},
journal = {Mathematische Zeitschrift},
volume = {207},
year = {1991},
pages = {551-562},
zbl = {0705.35043},
url = {http://dml.mathdoc.fr/item/GDZPPN002438682}
}
Dancer, E.N. On the number of positive solutions of some weakly nonlinear equations on annular regions.. Mathematische Zeitschrift, Tome 207 (1991) pp. 551-562. http://gdmltest.u-ga.fr/item/GDZPPN002438682/