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    Zhang, Zhi-Hua
      (with Y. D. Wu) The edge-tangent sphere of a circumscriptible tetrahedron, 7 (2007) 19--24.
    Zhou, Li
      Do dogs play with rulers and compasses?, 15 (2015) 159--164.
      Do dogs know the bifurcation locus?, 17 (2017) 45--46.
    Zimba, Jason
      On the possibility of trigonometric proofs of the Pythagorean theorem, 9 (2009) 275--278.
    Ziv, Barukh
      Napoleon-like configurations and sequences of triangles, 2 (2002) 115--128.