no. 1
Gradient methods for the construction of Ljusternik-Schnirelmann critical values
RAIRO. Analyse numérique, Tome 14 (1980) no. 1, pp. 43-54. 
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     title = {Gradient methods for the construction of {Ljusternik-Schnirelmann} critical values},
     journal = {RAIRO. Analyse num\'erique},
     pages = {43--54},
     publisher = {Centrale des revues, Dunod-Gauthier-Villars},
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     volume = {14},
     number = {1},
     year = {1980},
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Kratochvíl, Alexander; Nečas, Jindřich. Gradient methods for the construction of Ljusternik-Schnirelmann critical values. RAIRO. Analyse numérique, Tome 14 (1980) no. 1, pp. 43-54. http://www.numdam.org/item/M2AN_1980__14_1_43_0/

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