title: Properties of caustics produced by a positive lens: meridional rays.
authors.affiliation: Universidad Nacional Autónoma de México, Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Apdo. Postal 70-186, C. P. 04510, Distrito Federal, México. maximino.avendano@ccadet.unam.mx
authors.forename: Maximino
authors.initials: M
authors.lastname: Avendaño-Alejo
authors.forename: Luis
authors.initials: L
authors.lastname: Castañeda
authors.forename: Ivan
authors.initials: I
authors.lastname: Moreno