@article{AL_1982_21_2_a1,
     author = {V. D. Dzgoev},
     title = {Constructivizations of direct products of algebraic systems},
     journal = {Algebra i logika},
     pages = {138--148},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1982_21_2_a1/}
}