@article{1181073061,
author = {Krawcewicz, W. and Marzantowicz, W.},
title = {Some remarks on the Lusternik-Schnirelman method for non-differentiable functionals invariant with respect to a finite group action},
journal = {Rocky Mountain J. Math.},
volume = {20},
number = {4},
year = {1990},
pages = { 1041-1049},
language = {en},
url = {http://dml.mathdoc.fr/item/1181073061}
}
Krawcewicz, W.; Marzantowicz, W. Some remarks on the Lusternik-Schnirelman method for non-differentiable functionals invariant with respect to a finite group action. Rocky Mountain J. Math., Tome 20 (1990) no. 4, pp. 1041-1049. http://gdmltest.u-ga.fr/item/1181073061/