Decidability of plane edge coloring with three colors - Hung-Hsun Chen; Wen-Guei Hu; De-Jan Lai; Song-Sun Lin (CoRR, 2012)

Nonemptiness problems of Wang tiles with three colors. - Hung-Hsun Chen; Wen-Guei Hu; De-Jan Lai; Song-Sun Lin (Theor. Comput. Sci., 2014)