M. A.  Kaliakatsos-Papakostas, Epitropakis, M. G., and Vrahatis, M. N., ?Feature Extraction Using Pitch Class Profile Information Entropy?, in Mathematics and Computation in Music, vol. 6726, C.  Agon, Andreatta, M., Assayag, G., Amiot, E., Bresson, J., and Mandereau, J., Eds. Springer Berlin / Heidelberg, 2011, pp. 354-357.