%0 Journal Article %A A. I. Ivanov %A O. A. Ponomarev %T Investigation of the Fr\"ohlich model by the method of functional derivatives %J Teoretičeskaâ i matematičeskaâ fizika %D 1977 %P 382-394 %V 30 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1977_30_3_a9/ %G ru %F TMF_1977_30_3_a9