G. J. Ritchie

Linear Current Division in Resistive Areas, its Application to Computer Graphics

J. A. Turner, G. J. Ritchie, J. A. Turner, 1899 .

Linear current division in resistive areas: its application to computer graphics

J. A. Turner, G. J. Ritchie, 1970, AFIPS '70 (Spring).

Input Devices for Interactive Graphics

G. J. Ritchie, J. A. Turner, J. A. Turner, 1975, Int. J. Man Mach. Stud..