Puchuri, Liliana. «About the Stability Between a Foliation of Degree Two and the Pencil of Conics That de?Nes It». Pro Mathematica 31, no. 61 (diciembre 12, 2020): 33–52. Accedido marzo 3, 2026. https://revistas.pucp.edu.pe/index.php/promathematica/article/view/23267.