Pimenov, R. R. The geometry of perpendicularity: obtuse and acutes angles in known theorems. (Russian. English summary) Zbl 1454.51004 Vestn. Syktyvkar. Univ., Ser. 1, Mat. Mekh. Inform. 24, No. 3, 56-73 (2017). MSC: 51A20 PDF BibTeX XML Cite \textit{R. R. Pimenov}, Vestn. Syktyvkar. Univ., Ser. 1, Mat. Mekh. Inform. 24, No. 3, 56--73 (2017; Zbl 1454.51004) OpenURL
Lovyagin, Yu. N. Some remarks on the problem of the normability of Boolean algebras. (Russian. English summary) Zbl 1421.06004 Vestn. Syktyvkar. Univ., Ser. 1, Mat. Mekh. Inform. 24, No. 3, 43-55 (2017). MSC: 06E25 28A60 PDF BibTeX XML Cite \textit{Yu. N. Lovyagin}, Vestn. Syktyvkar. Univ., Ser. 1, Mat. Mekh. Inform. 24, No. 3, 43--55 (2017; Zbl 1421.06004) OpenURL
Kalinin, S. I. GA-convex functions. (Russian. English summary) Zbl 1405.26009 Vestn. Syktyvkar. Univ., Ser. 1, Mat. Mekh. Inform. 24, No. 3, 25-42 (2017). MSC: 26A51 PDF BibTeX XML Cite \textit{S. I. Kalinin}, Vestn. Syktyvkar. Univ., Ser. 1, Mat. Mekh. Inform. 24, No. 3, 25--42 (2017; Zbl 1405.26009) OpenURL