A New Technique for Dynamic Analysis of Acoustical Noise. - Roger H. Peterson; Roy L. Hoffman (IBM J. Res. Dev., 1965)

Sequential Algorithm for the Design of Piecewise Linear Classifiers. - Roy L. Hoffman; Maynard L. Moe (IEEE Trans. Syst. Sci. Cybern., 1969)

Segmentation Methods for Recognition of Machine-Printed Characters. - Roy L. Hoffman; J. Warren McCullough (IBM J. Res. Dev., 1971)

Pattern Recognition Signal Processing for Mechanical Diagnostics Signature Analysis. - Roy L. Hoffman; Keinosuke Fukunaga (IEEE Trans. Computers, 1971)