%0 Journal Article %A I. M. Khamitov %T A constructive approach to the quantum $(ch\varphi)_2$-model. I. The Gelfand--Levitan--Marcfaenko equations.method %J Zapiski Nauchnykh Seminarov POMI %D 1985 %P 147-190 %V 146 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1985_146_a9/ %G ru %F ZNSL_1985_146_a9