@article{TMF_1987_71_3_a13,
     author = {Yu. M. Ivanchenko and A. A. Lisyanskii and A. E. Filippov},
     title = {Exactly solvable model of phase transitions},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {441--450},
     year = {1987},
     volume = {71},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1987_71_3_a13/}
}