@article{AL_1977_16_1_a1,
     author = {G. V. Dorofeev},
     title = {Some properties of the join of varieties of algebras},
     journal = {Algebra i logika},
     pages = {24--39},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1977_16_1_a1/}
}