@article{KUIPM_1973_a2,
     author = {R. R. Shagidullin},
     title = {Axiomatizability of a projection of a universally axiomatizable class of algebraic systems},
     journal = {Issledovaniya po Prikladnoi Matematike i Informatike},
     pages = {23--27},
     publisher = {mathdoc},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUIPM_1973_a2/}
}