@article{MT_2024_27_1_a1,
     author = {A. V. Litavrin},
     title = {On alternating semigroups of endomorphisms of a groupoid},
     journal = {Matemati\v{c}eskie trudy},
     pages = {73--95},
     year = {2024},
     volume = {27},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2024_27_1_a1/}
}