Yonezawa, Fumiko; Sakamoto, Shoichi; Hori, Motoo (1989), "Percolation in two-dimensional lattices. I. A technique for the estimation of thresholds", Phys. Rev. B, 40 (1): 636–649, Bibcode:1989PhRvB..40..636Y, doi:10.1103/PhysRevB.40.636.
Yonezawa, Fumiko; Sakamoto, Shoichi; Hori, Motoo (1989), "Percolation in two-dimensional lattices. I. A technique for the estimation of thresholds", Phys. Rev. B, 40 (1): 636–649, Bibcode:1989PhRvB..40..636Y, doi:10.1103/PhysRevB.40.636.
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Tessellation Tango, The Mathematical Tourist, Drexel University, retrieved 2012-05-23.