%0 Journal Article %A V. I. Vozyakov %A V. N. Popov %T Functional approach to the theory of quantum crystals %J Zapiski Nauchnykh Seminarov POMI %D 1985 %P 46-61 %V 145 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1985_145_a3/ %G ru %F ZNSL_1985_145_a3