Hell, Pavol An introduction to the category of graphs. (English) Zbl 0465.05060 Topics in graph theory, Ann. N. Y. Acad. Sci. 328, 120-136 (1979). MSC: 05C99 05-02 05C15 18B99 PDFBibTeX XML
Hell, Pavol On some strongly rigid families of graphs and the full embeddings they induce. (English) Zbl 0299.05109 Algebra Univers. 4, 108-126 (1974). MSC: 05C25 05C20 18B15 08A05 PDFBibTeX XMLCite \textit{P. Hell}, Algebra Univers. 4, 108--126 (1974; Zbl 0299.05109) Full Text: DOI
Hell, P. Full embeddings into some categories of graphs. (English) Zbl 0257.05115 Algebra Univers. 2, 129-141 (1972). MSC: 05C25 08A05 18B15 05C15 PDFBibTeX XMLCite \textit{P. Hell}, Algebra Univers. 2, 129--141 (1972; Zbl 0257.05115) Full Text: DOI
Hell, Pavol; Nešetřil, Jaroslav Graphs and k-societies. (English) Zbl 0209.32201 Can. Math. Bull. 13, 375-381 (1970). MSC: 05C99 18B99 PDFBibTeX XMLCite \textit{P. Hell} and \textit{J. Nešetřil}, Can. Math. Bull. 13, 375--381 (1970; Zbl 0209.32201) Full Text: DOI