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"A Parallelogram Inscribed in a Quadrilateral: 10810."
Juan-Bosco Romero Márquez, Mohammed Ali Salem (2001)
- Juan-Bosco Romero Márquez, Mohammed Ali Salem:
A Parallelogram Inscribed in a Quadrilateral: 10810. Am. Math. Mon. 108(6): 571 (2001)
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