MAZĖTIS, Edmundas; MELNIČENKO, Grigorijus. A rational sine and cosine of the angles of a triangle. Lietuvos matematikos rinkinys, [S. l.], v. 54, n. B, p. 151–154, 2013. DOI: 10.15388/LMR.B.2013.28. Disponível em: https://journals.vu.lt./LMR/article/view/17182.. Acesso em: 21 nov. 2024.