On the Ideal Theory of Graphs, fifteen years later, Pan-American Advanced Studies Institute (PASI) Commutative Algebra and its connections to Geometry Olinda Brazil, August 14, 2009. PDF file
Algebraic Methods for Parameterized Linear Codes, Southwest Local Algebra Meeting, University of Texas-Arlington, 6-7 March 2010. PDF file
Algebraic Methods for Parameterized Linear Codes Arising from Graphs, Winter National Meeting, Canadian Mathematical Society, Vancouver, British Columbia, December 3-6, 2010. PDF file
Invariantes Algebraicos y Códigos Parametrizados sobre Campos Finitos, Unidad Académica de Matemáticas, UAZ, Coloquio, Zacatecas, 6 de Octubre, 2011. PDF file
Vanishing Ideals of Sets Parametrized by Monomials, Fall Southeastern Section Meeting, American Mathematical Society, New Orleans, Louisiana, October 13-14, 2012. PDF file
Aplicaciones de la Forma Normal de Smith de una Matriz Entera, XLV Congreso Nacional, Sociedad Matematica Mexicana, Universidad Autonoma de Queretaro, 28 de octubre al 2 de noviembre, 2012. PDF file