Fang, Guangcai
The structure of the critical set in the general mountain pass principle
Annales de la Faculté des sciences de Toulouse : Mathématiques, Série 6 : Tome 3 (1994) no. 3 , p. 345-362
Zbl 0834.58014 | MR 1313354
URL stable : http://www.numdam.org/item?id=AFST_1994_6_3_3_345_0

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