@article{MZM_1974_16_3_a13,
     author = {S. V. Polin},
     title = {Structure of bicategorical structures},
     journal = {Matemati\v{c}eskie zametki},
     pages = {455--460},
     year = {1974},
     volume = {16},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_16_3_a13/}
}