title: Null Ronchi-Hartmann test for a lens.
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: Dulce
authors.initials: D
authors.lastname: González-Utrera
authors.forename: Naser
authors.initials: N
authors.lastname: Qureshi
authors.forename: Luis
authors.initials: L
authors.lastname: Castañeda
authors.forename: César L
authors.initials: CL
authors.lastname: Ordóñez-Romero