KALIMUTHU, S. A Degenerate Spherical Triangle. Annals of Mathematics and Physics, [S. l.], v. 9, n. 3, p. 117–122, 2026. DOI: 10.17352/amp.000188. Disponível em: https://www.mathematicsgroup.com/amp/article/view/AMP-9-288. Acesso em: 21 aug. 2026.