%0 Journal Article %A N. D. Yakimov %T Variational properties of some inverse boundary value problems of filtration %J Trudy seminara po kraevym zadačam %D 1978 %P 191-201 %V 15 %N 15 %I mathdoc %U http://geodesic.mathdoc.fr/item/KUKZ_1978_15_15_a22/ %G ru %F KUKZ_1978_15_15_a22