@article{DM_2006_18_4_a2,
     author = {S. S. Marchenkov},
     title = {On the structure of equationally closed classes},
     journal = {Diskretnaya Matematika},
     pages = {18--30},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2006_18_4_a2/}
}