Author: Krupka, Demeter

Krupka, Demeter; Mikolášová, Věra: On the uniqueness of some differential invariants: $d$, $[,]$, $\nabla$. (English). Czechoslovak Mathematical Journal, vol. 34 (1984), issue 4, pp. 588-597
Krupka, Demeter: A map associated to the Lepagian forms on the calculus of variations in fibred manifolds. (English). Czechoslovak Mathematical Journal, vol. 27 (1977), issue 1, pp. 114-117,118

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