Rundungsfehler beim "All-integer Integer Programming Algorithm" von Gomory. - Willi Hahn (Computing, 1973)

An algebraic approach to assignment problems. - Rainer E. Burkard; Willi Hahn; Uwe Zimmermann (Math. Program., 1977)

Some techniques for solving linear equation systems with guarantee. - Willi Hahn; Karlheinz Mohr; Ulrich Schauer (Computing, 1985)

An Interactive Approach for Extending IEEE Arithmetic: Auxiliary Processor AP87. - Willi Hahn; Karlheinz Mohr (APL, 1992)

ANDYMMO: Animation of the Dynamics of Mechanical and Control Models. - Willi Hahn; Erwin Hasenjäger; Jens Trautmann 002 (APL, 1996)

Choices in server-side programming: a comparative programming exercise. - Robert G. Brown; Willi Hahn (APL, 1999)

Hasta la vista... looking back at APL2002 in Madrid. - Willi Hahn (ACM SIGAPL APL Quote Quad, 2003)