Jotov, O. Quaternionic sequences and subsets. (Macedonian. English summary) Zbl 0599.30076 God. Zb., Mat. Fak. Univ. Kiril Metodij Skopje 33/34, 85-93 (1983). MSC: 30G35 PDFBibTeX XMLCite \textit{O. Jotov}, God. Zb., Mat. Fak. Univ. Kiril Metodij Skopje 33/34, 85--93 (1983; Zbl 0599.30076)
Apostolova, M. P. Hypersurface in \(P_ 4\) obtained by means of stereographic projection of a quadric on a plane and a collineation. (Bulgarian. English, Russian summaries) Zbl 0594.51023 God. Vissh. Uchebn. Zaved., Prilozhna Mat. 18(1984), No. 4, 183-196 (1983). MSC: 51N15 PDFBibTeX XMLCite \textit{M. P. Apostolova}, God. Vissh. Uchebn. Zaved., Prilozh. Mat. 18, No. 4, 183--196 (1983; Zbl 0594.51023)
Apostolova, M. P. Hypersurfaces of the fourth and third degrees in \(P_ 4\) obtained by means of stereographic projection of a quadric on a plane. (Bulgarian. English, Russian summaries) Zbl 0594.51021 God. Vissh. Uchebn. Zaved., Prilozhna Mat. 19(1984), No. 2, 181-192 (1983). MSC: 51N15 PDFBibTeX XMLCite \textit{M. P. Apostolova}, God. Vissh. Uchebn. Zaved., Prilozh. Mat. 19, No. 2, 181--192 (1983; Zbl 0594.51021)
Apostolova, M. P. Equations of hypersurfaces of fifth, fourth and third degrees in \(P_ 4\) obtained by means of stereographic projection of a quadric on a plane. (Bulgarian. English, Russian summaries) Zbl 0594.51020 God. Vissh. Uchebn. Zaved., Prilozhna Mat. 19(1984), No. 2, 171-180 (1983). MSC: 51N15 PDFBibTeX XMLCite \textit{M. P. Apostolova}, God. Vissh. Uchebn. Zaved., Prilozh. Mat. 19, No. 2, 171--180 (1983; Zbl 0594.51020)
Apostolova, M. P. A hyperquintic in \(P_ 4\) obtained by means of a stereographic projection of a quadric on a plane. (Bulgarian. English, Russian summaries) Zbl 0561.51024 God. Vissh. Uchebn. Zaved., Prilozhna Mat. 18 (1982), No. 3, 153-166 (1983). MSC: 51N35 14A10 14N05 PDFBibTeX XMLCite \textit{M. P. Apostolova}, God. Vissh. Uchebn. Zaved., Prilozh. Mat. 18, No. 3, 153--166 (1983; Zbl 0561.51024)
Gyarmathi, A.; Gyarmathi, L. Die Verwendung der Zentralprojektion im Modell Cayley-Klein des hyperbolischen Raumes. (German) Zbl 0534.51010 Publ. Math. Debr. 30, 143-155 (1983). Reviewer: H.Schaal MSC: 51M10 51N05 51M15 PDFBibTeX XMLCite \textit{A. Gyarmathi} and \textit{L. Gyarmathi}, Publ. Math. Debr. 30, 143--155 (1983; Zbl 0534.51010)