1. A. Rezaian, Systems Analysis and Design, First., vol. 7. The organization for Researching and Composiing University Textbooks in the Islamic and Human Sciences (SAMT), Tehran, Iran, 2019.
2. An outline of general system theory;Bertalanffy;Br. J. Philos. Sci.,1950
3. The history and status of general systems theory;Von Bertalanffy;Acad. Manag. J.,1972
4. 2. Ludwig Von Bertalanffy - General System Theory-Braziller (1968).pdf.
5. A brief history of software engineering;Wirth;IEEE Ann. Hist. Comput.,2008