Aplanar, two-dimensional geometry in APL. - G. J. Porter (ACM SIGAPL APL Quote Quad, 1980)

Tessl, a tesselation workspace. - G. J. Porter (ACM SIGAPL APL Quote Quad, 1980)

A Solution to the Transputer Data Distribution Problem. - A. G. Al-Bakkar; G. J. Porter; Stanley S. Ipson (PDPTA, 1996)