@article{RM_1970_25_3_a17,
     author = {M. S. Burgin},
     title = {The groupoid of varieties of linear $\Omega$-algebras},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {25},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1970_25_3_a17/}
}