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Zaharinov, Todor
The Simson triangle and its properties, 17 (2017) 373--381.
Orthopoles, flanks, and Vecten points, 17 (2017) 401--410.

Zhang, Yong
(with J. Peng) Heron triangle and rhombus pairs with a common area and a common perimeter, 17 (2017) 419--423.

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.
Primitive Heronian triangles with integer inradius and exradii, 18 (2018) 71--77.

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.