@article{VMUMM_2020_6_a9,
     author = {A. N. Lata},
     title = {Unary algebras without proper subalgebras},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {60--63},
     publisher = {mathdoc},
     number = {6},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2020_6_a9/}
}