@article{MZM_2009_86_1_a10,
     author = {A. L. Yakymiv},
     title = {On the {Number} of $A${-Mappings}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {139--147},
     publisher = {mathdoc},
     volume = {86},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2009_86_1_a10/}
}