Pal, S. K., Polkowski, L., & Skowron, A. (2004). Rough-neural computing: Techniques for computing with words. Springer.

Pal, Sankar K., Lech Polkowski, and Andrzej Skowron. Rough-neural Computing: Techniques for Computing with Words. Berlin ; New York: Springer, 2004.

Pal, Sankar K., et al. Rough-neural Computing: Techniques for Computing with Words. Springer, 2004.