A Survey of Preprocessing and Feature Extraction Techniques for Radiographic Images. - Ernest L. Hall; Richard P. Kruger; Samuel J. Dwyer III; David L. Hall; Robert W. Mclaren; Gwilyu S. Lodwick (IEEE Trans. Computers, 1971)

Computer Diagnosis of Pneumoconiosis. - Richard P. Kruger; William B. Thompson; A. Franklin Turner (IEEE Trans. Syst. Man Cybern., 1974)

A Terminal/Time Share Based Method for Interactive Left Ventricular Volume Estimation. - Richard P. Kruger; S. Hui (IEEE Trans. Syst. Man Cybern., 1976)

Comments on "Nonstationary Assumptions for Gaussian Models in Images". - Henry J. Trussell; Richard P. Kruger (IEEE Trans. Syst. Man Cybern., 1978)