Ras, Z. W., & Ribarsky, W. (2009). Advances in information and intelligent systems. Springer.

Ras, Zbigniew W., and William Ribarsky. Advances in Information and Intelligent Systems. Berlin, Heidelberg: Springer, 2009.

Ras, Zbigniew W., and William Ribarsky. Advances in Information and Intelligent Systems. Springer, 2009.