@article{AIHPC_1988__5_2_119_0,
author = {Szulkin, Andrzej},
title = {Ljusternik-Schnirelmann theory on $C^1$-manifolds},
journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
volume = {5},
year = {1988},
pages = {119-139},
mrnumber = {954468},
zbl = {0661.58009},
language = {en},
url = {http://dml.mathdoc.fr/item/AIHPC_1988__5_2_119_0}
}
Szulkin, Andrzej. Ljusternik-Schnirelmann theory on $C^1$-manifolds. Annales de l'I.H.P. Analyse non linéaire, Tome 5 (1988) pp. 119-139. http://gdmltest.u-ga.fr/item/AIHPC_1988__5_2_119_0/
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