Fernández Sánchez, Percy, Evelia R. García, y Nancy Saravia Molina. A Remark on the Tjurina and Milnor Numbers of a Foliation of Second Type. Pro Mathematica 32, no. 63 (agosto 31, 2022): 11-22. Accedido febrero 4, 2023. https://revistas.pucp.edu.pe/index.php/promathematica/article/view/25727.