CHATTOPADHYAY, R. Establishing the Formulae for Perimeter and Area of a Circle and of an Ellipse and the Value of π. Indian Science Cruiser, [S. l.], v. 31, n. 4, p. 54–58, 2017. DOI: 10.24906/isc/2017/v31/i4/158291. Disponível em: https://informaticsjournals.com/index.php/ISC/article/view/38541. Acesso em: 17 jul. 2024.