1. The programmer as navigator;Bachman;Comm. ACM,1973
2. Booch, G., 1994. Object-Oriented Analysis and Design. Benjamin/Cummings, Mento Park, CA
3. The entity relationship model–Towards a unified view of data;Chen;ACM Trans. Database Systems,1976
4. Christie, B. (Ed.), 1985. Human Factors of Information Technology in the Office. Wiley, Chichester
5. Davis, A.M., 1990. Software Requirements Analysis and Specification. Prentice-Hall, Englewood Cliffs, NJ