Coding a general-purpose digital computer to operate as a differential analyzer. - Ralph G. Selfridge (AIEE-IRE Computer Conference (Western), 1955)

Fun and games, good and bad, with APL. - Ralph G. Selfridge (ACM-SE, 1977)

Extensions of variables and indexing conventions. - Ralph G. Selfridge (ACM-SE, 1978)

Splines and graphs. - Ralph G. Selfridge (ACM SIGAPL APL Quote Quad, 1978)

The reachable volume of a robot arm. - Ralph G. Selfridge (ACM Southeast Regional Conference, 1982)

Analysis of Robot Manipulators. - Ralph G. Selfridge (APL, 1989)

Simple Problems from a Different Perspective. - Ralph G. Selfridge (ACM SIGAPL APL Quote Quad, 1990)

Solving Two or Three Polynomials in Two or Three Variables. - Ralph G. Selfridge (APL, 1993)

Linear programming in APL. - Ralph G. Selfridge (ACM SIGAPL APL Quote Quad, 1996)

Fortran to and from APL2 and J. - Ralph G. Selfridge (ACM SIGAPL APL Quote Quad, 1999)

Forward analysis of some special Stewart platforms. - Ralph G. Selfridge; Gary K. Matthew (J. Field Robotics, 2000)

Bit arrays from row and column sums. - Ralph G. Selfridge (APL, 2003)

APL and bit matrices are for the birds. - Ralph G. Selfridge (ACM SIGAPL APL Quote Quad, 2003)

A small part of lattice theory. - Ralph G. Selfridge (ACM SIGAPL APL Quote Quad, 2007)