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Polymorphe Kacheln. II. (Polymorphic tiles. II)
[For part I, see ibid. 194, 133-168 (1985; Zbl 0597.05022).] A tile is a unit-disk-homeomorphic subset of the plane. A tiling is a covering of the plane by tiles with pairwise disjoint interiors. A tile collection is dimorphic if it permits two incongruent tilings.openaire +2 more sources