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@article{MZM_1985_38_2_a3, author = {N. A. Peryazev}, title = {Positive indistinguishability of algebraic systems, and completeness of positive theories}, journal = {Matemati\v{c}eskie zametki}, pages = {208--217}, publisher = {mathdoc}, volume = {38}, number = {2}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1985_38_2_a3/} }
N. A. Peryazev. Positive indistinguishability of algebraic systems, and completeness of positive theories. Matematičeskie zametki, Tome 38 (1985) no. 2, pp. 208-217. http://geodesic.mathdoc.fr/item/MZM_1985_38_2_a3/