%0 Journal Article %A Hlaváček, Ivan %T Variational principles for parabolic equations %J Applications of Mathematics %D 1969 %P 278-297 %V 14 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1969.103236/ %R 10.21136/AM.1969.103236 %G en %F 10_21136_AM_1969_103236