@Article{Ryjáček2010, author = "Ryjáček, Zdeněk and Zamfirescu, Carol T.", title = "Research problems from the 18th workshop ‘3in1’ 2009 (edited by Mariusz Meszka)", journal = "Opuscula Math.", year = "2010", volume = "30", number = "4", pages = "527--532", doi = "http://dx.doi.org/10.7494/OpMath.2010.30.4.527", url = "http://dx.doi.org/10.7494/OpMath.2010.30.4.527", abstract = "A collection of open problems that were posed at the 18th Workshop ‘3in1’, held on November 26-28, 2009 in Krakow, Poland. The problems are presented by Zdenek Ryjacek in \"Does the Thomassen's conjecture imply N=NP?\" and \"Dominating cycles and hamiltonian prisms\", and by Carol T. Zamfirescu in \"Two problems on bihomogeneously traceable digraphs\".", keywords = "Hamilton-connected graph, hamiltonian graph, dominating cycle, bihomogeneously traceble graph", issn = "1232-9274" }