Hell, Pavol; Zhou, Huishan; Zhu, Xuding On homomorphisms to acyclic local tournaments. (English) Zbl 0837.05066 J. Graph Theory 20, No. 4, 467-471 (1995). Reviewer: D.P.Brown (Carbondale) MSC: 05C20 PDFBibTeX XMLCite \textit{P. Hell} et al., J. Graph Theory 20, No. 4, 467--471 (1995; Zbl 0837.05066) Full Text: DOI
Hell, Pavol; Yu, Xingxing; Zhou, Huishan Independence ratios of graph powers. (English) Zbl 0795.05054 Discrete Math. 127, No. 1-3, 213-220 (1994). Reviewer: H.T.Lau (Verdun / Quebec) MSC: 05C15 PDFBibTeX XMLCite \textit{P. Hell} et al., Discrete Math. 127, No. 1--3, 213--220 (1994; Zbl 0795.05054) Full Text: DOI
Hell, Pavol; Zhou, Huishan; Zhu, Xuding Mutiplicativity of oriented cycles. (English) Zbl 0803.05029 J. Comb. Theory, Ser. B 60, No. 2, 239-253 (1994). Reviewer: W.G.Brown (Montreal) MSC: 05C38 05C15 05C20 PDFBibTeX XMLCite \textit{P. Hell} et al., J. Comb. Theory, Ser. B 60, No. 2, 239--253 (1994; Zbl 0803.05029) Full Text: DOI
Hell, Pavol; Zhou, Huishan; Zhu, Xuding Homomorphisms to oriented cycles. (English) Zbl 0794.05037 Combinatorica 13, No. 4, 421-433 (1993). Reviewer: P.Horák (Bratislava) MSC: 05C20 05C99 05C38 PDFBibTeX XMLCite \textit{P. Hell} et al., Combinatorica 13, No. 4, 421--433 (1993; Zbl 0794.05037) Full Text: DOI