M. A. Pervukhin, A. A. Stepanova, N. V. Trikashnaya, “Partially ordered abelian groupoids”, Sibirsk. Mat. Zh., 65:4 (2024), 702–708
2009
2.
M. A. Pervukhin, A. A. Stepanova, “Axiomatizability and completeness of some classes of partially ordered polygons”, Algebra Logika, 48:1 (2009), 90–121; Algebra and Logic, 48:1 (2009), 54–71
M. A. Pervukhin, A. A. Stepanova, “Axiomatizability of free $S$-posets”, Fundam. Prikl. Mat., 15:1 (2009), 99–115; J. Math. Sci., 166:6 (2010), 756–766