A. I. Mal′cév. Ob eléméntwnyh téoriáh lokal′no svobodnyh univérsal′nyh algébr. Doklady Akadémii Nauk SSSR, vol. 138 (1961), pp. 1009–1012. - A. I. Mal′cev. On the elementary theories of locally free universal algebras. English translation of the preceding by Elliott Mendelson. Soviet mathematics, vol. 2 no. 3 (1961) pp. 768–771. - A. I. Mal′cev. Aksiomatiziruémyé klassy lokal′no svobodnyh algébr nékotoryh tipov (Axiomatizable classes of locally free algebras of several types). Sibirskij matématičéskij žurnal, vol. 3 (1962), pp. 729–743.
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