1. Allen, J.F., “Maintaining Knowledge about Temporal Intervals,” Communications of the ACM, Vol. 26, No. 11, Nov. 1983, pp. 832–843.
2. Berra, P.B., Chen, C.Y.R., Ghafoor, A., Lin, C.C., Little, T.D.C., and Shin, D., “Architecture for distributed multimedia database systems,” Computer Communication, Butterworth, Vol. 13, No. 4, 1990, pp. 217–231.
3. Caudillo, R. and Mainguenaud, M., “A Hypertext-like Multimedia Document Data Model,” in Proc. Int. Conf. on Multimedia Information Systems, 1991, pp. 221-241.
4. Christodoulakis, S., Vandenbroek, J., Li, J., Li, T., Wan, S., Wang, Y., Papa, M., and Bertino, E., “Development of a Multimedia Information System for an Office Environment,” in Proc. VLDB, 1984, pp. 261-271.
5. Christodoulakis, S., “Multimedia Data Base Management: Applications and Problems — A Position Paper,” in Proc. ACM SIG-MOD, 1985, pp. 304-305.