%0 Journal Article %A Hlaváček, Ivan %T Derivation of non-classical variational principles in the theory of elasticity %J Applications of Mathematics %D 1967 %P 15-29 %V 12 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1967.103063/ %R 10.21136/AM.1967.103063 %G en %F 10_21136_AM_1967_103063