William A. Wulf. Structured programming in the basic layers of an operating system. In Friedrich L. Bauer, Klaus Samelson, editors, Language Hierarchies and Interfaces, International Summer School, Marktoberdorf, Germany, July 23 - August 2, 1975. Volume 46 of Lecture Notes in Computer Science, pages 293-344, Springer, 1975.
Abstract is missing.