Nedjah, N., Macedo Mourelle, L., Kacprzyk, J., Franȧ, F. M. G., & De Souza, A. F. (2009). Intelligent Text Categorization and Clustering. Berlin, Heidelberg: Springer Berlin Heidelberg.

Nedjah, Nadia., Luiza Macedo Mourelle, Janusz Kacprzyk, Felipe M. G. Franȧ, and Alberto Ferreira De Souza. Intelligent Text Categorization and Clustering. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009.

Nedjah, Nadia., et al. Intelligent Text Categorization and Clustering. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009.