University of Michigan (Hrsg.):Programmer's Journal. Band5. Avant-Garde Creations, 1987, S.16 (englisch, keine Vorschau verfügbar): “Ken Thompson, the father of Unix, wrote the very first rudimentary command interface for Ma Bell's OS—in typical researcher fashion calling it the Thompson shell.”
Isrd:Basics Of Os Unix And Shell Programming. Tata McGraw-Hill Education, 2006, ISBN 978-0-07-061681-3 (englisch, eingeschränkte Vorschauin der Google-Buchsuche): “MULTICS exerted a strong influence on the new operating system. The basic file system organization, the idea of the shell as a user process, use of separate process for each command and similar other features were inherited from it.”
Michael L. Scott:Programming Language Pragmatics. Morgan Kaufmann, 2009, ISBN 978-0-08-092299-7 (englisch, eingeschränkte Vorschauin der Google-Buchsuche): “When work began on the groundbreaking Multics system in 1964, [Louis] Pouzin sketched the design of an extended command language, with quoting and argument-passing mechanisms, for which he coined the term “shell.””
S.K. Bajpai:Introduction To Computers And C Programming. New Age International, 2007, ISBN 978-81-224-1379-3 (englisch, eingeschränkte Vorschauin der Google-Buchsuche): “UNIX … has basically following parts: Kernel …, Shell …, The file system …”