Program Indentation and Comprehensibility. - Richard J. Miara; Joyce A. Musselman; Juan A. Navarro; Ben Shneiderman (Commun. ACM, 1983)

A PC-Based System for Visualization of the Electrical Axis and Vectocardiogram. - Juan A. Navarro; Luis F. Hernandez; J. Manuel Ramirez (CBMS, 1998)