@article{IM2_2022_86_2_a1,
     author = {E. K. Brusyanskaya and A. A. Klyachko},
     title = {On the number of epi-, mono- and homomorphisms of  groups},
     journal = {Izvestiya. Mathematics },
     pages = {243--251},
     publisher = {mathdoc},
     volume = {86},
     number = {2},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2022_86_2_a1/}
}