XPLG: experiences in implementing an experimental interactive graphics programming system. - C. Norman Turrill; William R. Mallgren (SIGGRAPH, 1974)

Formal Specification of Graphic Data Types. - William R. Mallgren (ACM Trans. Program. Lang. Syst., 1982)

Cycling softkeys. - Sara A. Bly; William R. Mallgren (IEEE Computer Graphics and Applications, 1988)