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Gardner, M. (1960) Mathematical Games: The Games and Puzzles of Lewis Carroll, and the Answers to February’s Problems. Scientific American, 202, 172-182.
https://doi.org/10.1038/scientificamerican0360-172

has been cited by the following article:

• TITLE: Acute Triangulations of the Surface of Circular Cone

  AUTHORS: Xiao Feng, Penghao Cao, Zhikui Chang

  KEYWORDS: Acute Triangulation, Surface of Circular Cone, Gauss-Bonnet Formula

  JOURNAL NAME: Open Journal of Discrete Mathematics, Vol.12 No.2, April 1, 2022

  ABSTRACT: In this paper, we prove that the surface of any circular cone can be triangulated into 8 non-obtuse and 20 acute triangles. Furthermore, we also show that the bounds are both the best possible.