@article{IIGUM_2023_44_a6,
     author = {Andrey V. Litavrin},
     title = {On anti-endomorphisms of groupoids},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {82--97},
     publisher = {mathdoc},
     volume = {44},
     year = {2023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2023_44_a6/}
}