@article{TRSPY_1989_191_a1,
     author = {N. N. Bogolyubov (Jr.) and A. N. Kireev and A. M. Kurbatov and D. P. Sankovich},
     title = {Some problems in polaron theory},
     journal = {Informatics and Automation},
     pages = {17--33},
     publisher = {mathdoc},
     volume = {191},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1989_191_a1/}
}