@article{UZERU_2011_2_a6,
     author = {S. G. Dalalyan},
     title = {$S$-universality  in  $2$-categories},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {39--44},
     publisher = {mathdoc},
     number = {2},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2011_2_a6/}
}