Geodesic
On a~product of classes of algebraic systems
Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 1 (2010), pp. 106-120

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This paper defines a product of classes of algebraic systems and proves that it is a universal class, a quasi-variety or variety if these classes are universal classes, quasi-varieties or varieties, respectively. 
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     author = {Vasile I. Ursu},
     title = {On a~product of classes of algebraic systems},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {106--120},
     publisher = {mathdoc},
     number = {1},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2010_1_a9/}
}
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Vasile I. Ursu. On a~product of classes of algebraic systems. Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 1 (2010), pp. 106-120. http://geodesic.mathdoc.fr/item/BASM_2010_1_a9/