S. A. Badaev, B. S. Kalmurzaev, N. K. Mukash, M. Mustafa, “One-element rogers semilattices in the Ershov hierarchy”, Algebra Logika, 60:4 (2021), 433–437; Algebra and Logic, 60:4 (2021), 284–287
S. A. Badaev, B. S. Kalmurzayev, N. K. Mukash, A. A. Khamitova, “Special classes of positive preorders”, Sib. Èlektron. Mat. Izv., 18:2 (2021), 1657–1666
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