@article{UZERU_2004_2_a1,
     author = {I. R. Simonyan},
     title = {Latices of distributive and hyperdistributive varieties of semigroups},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {7--19},
     publisher = {mathdoc},
     number = {2},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2004_2_a1/}
}