Feder, Tomás; Hell, Pavol; Larose, Benoît; Siggers, Mark; Tardif, Claude Graphs admitting \(k\)-NU operations. II: The irreflexive case. (English) Zbl 1298.05272 SIAM J. Discrete Math. 28, No. 2, 817-834 (2014). MSC: 05C75 08B05 PDFBibTeX XMLCite \textit{T. Feder} et al., SIAM J. Discrete Math. 28, No. 2, 817--834 (2014; Zbl 1298.05272) Full Text: DOI
Hell, Pavol; Siggers, Mark Semilattice polymorphisms and chordal graphs. (English) Zbl 1284.05125 Eur. J. Comb. 36, 694-706 (2014). MSC: 05C25 PDFBibTeX XMLCite \textit{P. Hell} and \textit{M. Siggers}, Eur. J. Comb. 36, 694--706 (2014; Zbl 1284.05125) Full Text: DOI
Feder, Tomás; Hell, Pavol; Larose, Benoît; Loten, Cynthia; Siggers, Mark; Tardif, Claude Graphs admitting \(k\)-NU operations. I: The reflexive case. (English) Zbl 1285.05152 SIAM J. Discrete Math. 27, No. 4, 1940-1963 (2013). MSC: 05C75 08B05 PDFBibTeX XMLCite \textit{T. Feder} et al., SIAM J. Discrete Math. 27, No. 4, 1940--1963 (2013; Zbl 1285.05152) Full Text: DOI