How to Teach Computer Science to Students Who Don't Like Science. - Sietse G. van der Meulen (GI Jahrestagung, 1974)

Informal Introduction to ALGOL 68, Second Edition. - Charles H. Lindsey; Sietse G. van der Meulen (Informal Introduction to ALGOL 68, 2nd Edition, 1977)

ALGOL 68 might-have-beens. - Sietse G. van der Meulen (Strathclyde ALGOL 68 Conference, 1977)