Rojas, J., R. Mendoza, and E. da Silva. “Projective Squares in â„™² and Bott‘s Localization Formula”. CUBO, A Mathematical Journal, vol. 12, no. 1, Mar. 2010, pp. 195–217, https://www.perspectivasdelacomunicacion.cl/ojs/index.php/cubo/article/view/1437.