Shape and motion of nonrigid bodies. - Su-Shing Chen; Michael A. Penna (Comput. Vis. Graph. Image Process., 1986)

Shape-from-shading using multiple light sources. - Michael A. Penna; Su-Shing Chen (Int. J. Intell. Syst., 1986)

Local and semi-local shape from shading for a single perspective image of a smooth object. - Michael A. Penna (Comput. Vis. Graph. Image Process., 1989)

A Shape From Shading Analysis for a Single Perspective Image of a Polyhedron. - Michael A. Penna (IEEE Trans. Pattern Anal. Mach. Intell., 1989)

Camera Calibration: A Quick and Easy Way to Determine the Scale Factor. - Michael A. Penna (IEEE Trans. Pattern Anal. Mach. Intell., 1991)

Determining camera parameters from the perspective projection of a quadrilateral. - Michael A. Penna (Pattern Recognit., 1991)

Non-rigid motion analysis: Isometric motion. - Michael A. Penna (CVGIP Image Underst., 1992)

Models for map building and navigation. - Michael A. Penna; Jian Wu (IEEE Trans. Syst. Man Cybern., 1993)

The Motion Analysis of Nonrigid Membranes. - Michael A. Penna (Comput. Vis. Image Underst., 1999)

A Simple Method for Fitting Sphere-Like Surfaces. - Michael A. Penna; Kris A. Dines (IEEE Trans. Pattern Anal. Mach. Intell., 2007)