Robbins, D. P. (1995). «Areas of Polygons Inscribed in a Circle». The American Mathematical Monthly102 (6): 523-530. JSTOR2974766. doi:10.2307/2974766.
Robbins, D. P. (1995). «Areas of Polygons Inscribed in a Circle». The American Mathematical Monthly102 (6): 523-530. JSTOR2974766. doi:10.2307/2974766.