%0 Journal Article %A Janovský, V. %T Hybrid variational principles and their use in the finite element method %J Acta Universitatis Carolinae. Mathematica et Physica %D 1974 %P 59-61 %V 15 %N 1-2 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/AUCMP_1974__15_1-2_a13/ %G en %F AUCMP_1974__15_1-2_a13