@article{MT_2009_12_2_a7,
     author = {A. G. Pinus},
     title = {Geometric scales for varieties of algebras and quasi-identities},
     journal = {Matemati\v{c}eskie trudy},
     pages = {160--169},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2009_12_2_a7/}
}