Todorinov, S. A.; D”rzhanova, P. I. Nonlinearly ordered operator groups. (Bulgarian. Russian, German summaries) Zbl 0358.06037 God. Vissh. Tekh. Uchebn. Zaved., Mat. 8(1972), No. 4, 89-95 (1973). MSC: 06F15 PDFBibTeX XMLCite \textit{S. A. Todorinov} and \textit{P. I. D''rzhanova}, God. Vissh. Tekh. Uchebn. Zaved., Mat. 8, No. 4, 89--95 (1973; Zbl 0358.06037)
Gerov, G. H. Eine vollständige Ordnung der Kanten eines Graphen, die in jedem Knotenpunkt teilweise geordnet sind. (Russian) Zbl 0327.05127 God. Vissh. Tekh. Uchebn. Zaved., Mat. 7(1971), No. 4, 33-38 (1973). MSC: 05C99 06A05 06A06 PDFBibTeX XMLCite \textit{G. H. Gerov}, God. Vissh. Tekh. Uchebn. Zaved., Mat. 7, No. 4, 33--38 (1973; Zbl 0327.05127)
Martinova, M. K. On the m-dimensional lattice graph with characteristic n. (Bulgarian) Zbl 0315.05128 God. Vissh. Tekh. Uchebn. Zaved., Mat. 8(1972), No. 2, 155-163 (1973). MSC: 05C99 05C30 06F25 PDFBibTeX XMLCite \textit{M. K. Martinova}, God. Vissh. Tekh. Uchebn. Zaved., Mat. 8, No. 2, 155--163 (1973; Zbl 0315.05128)
Topencarov, V. V. Ringoide. III. (Bulgarian) Zbl 0318.18003 God. Vissh. Tekh. Uchebn. Zaved., Mat. 4(1967), No. 3, 113-126 (1971). MSC: 18A05 16Y60 06F25 18D05 PDFBibTeX XMLCite \textit{V. V. Topencarov}, God. Vissh. Tekh. Uchebn. Zaved., Mat. 4, No. 3, 113--126 (1971; Zbl 0318.18003)