«Arcisphere technologies». Tutorial: The Software Development Life Cycle (SDLC), 2012. Arxivat de l'original el 2019-02-17 [Consulta: 3 novembre 2014].
«Arcisphere technologies». Tutorial: The Software Development Life Cycle (SDLC), 2012. Arxivat de l'original el 2019-02-17 [Consulta: 3 novembre 2014].
United States. Navy Mathematical Computing Advisory Panel. (29 June 1956), Symposium on advanced programming methods for digital computers, [Washington, D.C.]: Office of Naval Research, Dept. of the Navy, OCLC 10794738