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://www.journals.vu.lt/LMR/article/view/17182.. Acesso em: 29 apr. 2024.