Angle Detection on Digital Curves. - Azriel Rosenfeld; Emily G. Johnston (IEEE Trans. Computers, 1973)

Printed Text Discrimination. - Emily G. Johnston (Comput. Graph. Image Process., 1974)

Digital Detection of Pits, Peaks, Ridges, and Ravines. - Emily G. Johnston; Azriel Rosenfeld (IEEE Trans. Syst. Man Cybern., 1975)