A RISC processor for embedded applications within an ASIC. - Charles E. Roberts (IEEE Micro, 1991)

Sets of Mutually Orthogonal Latin Squares with "Like Subsquares". - Charles E. Roberts (J. Comb. Theory A, 1992)

Sets of Mutually Orthogonal Latin Squares with "Like Subsquares, " II. - Charles E. Roberts (J. Comb. Theory A, 1995)

Complete Sets of Orthogonal Self-Orthogonal Latin Squares. - George Graham; Charles E. Roberts (Ars Comb., 2002)