@article{ZNSL_1981_101_a11,
     author = {V. N. Popov},
     title = {Functional integral method for the {BCS-type} models},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {128--150},
     publisher = {mathdoc},
     volume = {101},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1981_101_a11/}
}