@article{AL_1993_32_2_a2,
     author = {A. I. Omarov},
     title = {Multiplicative formulas},
     journal = {Algebra i logika},
     pages = {139--147},
     publisher = {mathdoc},
     volume = {32},
     number = {2},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1993_32_2_a2/}
}