Open fullscreen systems. - Martin Gfeller; Monika Stengl (APL, 1986)

Contributed Articles: Operators Considered Harmful. - Martin Gfeller (ACM SIGAPL APL Quote Quad, 1986)

Operators considered harmful. - Martin Gfeller (ACM SIGAPL APL Quote Quad, 1986)

APL arrays and their editor. - Martin Gfeller (ACM SIGPLAN Notices, 1986)

From a Functional Point of View: A Framework for Extensions to APL. - Martin Gfeller (APL, 1988)

Parts of Arrays - An Introduction. - Martin Gfeller (APL, 1988)

A Future APL: Examples and Problems. - Martin Gfeller (APL, 1989)

Object Oriented Programming in AIDA APL. - Martin Gfeller (APL, 1989)

An Application Development Platform. - Morten Kromberg; Martin Gfeller (APL, 1990)

Events. - Martin Gfeller (ACM SIGAPL APL Quote Quad, 1990)

Walks into the APL Design Space. - Martin Gfeller (APL, 1992)

A Risk Management Prototype Using Object-Oriented APL. - Martin Gfeller (APL, 1994)

A future for APL. - Martin Gfeller (ACM SIGAPL APL Quote Quad, 1994)