@article{AA_2009_21_3_a1,
     author = {N. M. Bogolyubov},
     title = {Five vertex model with fixed boundary conditions},
     journal = {Algebra i analiz},
     pages = {58--78},
     publisher = {mathdoc},
     volume = {21},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2009_21_3_a1/}
}