Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_1987_17_2a_7, author = {{\CYRYA}{\cyra}{\cyrn}{\cyre}{\cyrz} {\CYRU}{\cyrsh}{\cyra}{\cyrn}}, title = {{\CYRCH}{\cyra}{\cyrs}{\cyrt}{\cyri}{\cyrch}{\cyrn}{\cyrery}{\cyre} {{\CYRA}t-{\cyrg}{\cyrr}{\cyru}{\cyrp}{\cyrp}{\cyro}{\cyri}{\cyrd}{\cyrery}}}, journal = {Novi Sad Journal of Mathematics}, pages = {109-127}, publisher = {mathdoc}, volume = {17}, number = {2}, year = {1987}, url = {http://geodesic.mathdoc.fr/item/NSJOM_1987_17_2a_7/} }
Яанез Ушан. Частичные Аt-группоиды. Novi Sad Journal of Mathematics, Tome 17 (1987) no. 2. http://geodesic.mathdoc.fr/item/NSJOM_1987_17_2a_7/