CAMILO E. VALDERRAMA, and GONZALO ULLOA: Combining spectral and fractal features for emotion recognition on Electroencephalographic signals, In WSEAS Transactions on Signal Processing, vol.10, July 2014, pp 481-496. Available here

CAMILO E. VALDERRAMA C., and G. ULLOA: Análisis espectral de parámetros fisiológicos para la detección de emociones, In Revista S&T – Sistemas y Telemática, vol. 20, March 2012, pp. 27-49.  (Article in Spanish)
Available  here

Articles in proceedings of National Conference

C.E. VALDERRAMA C., and G. ULLOA, Spectral Analysis of physiological parameters for emotion detection, In Proceedings XVII Symposium of Image, Signal Processing, and Artificial Vision (STSIVA), 12-14 September, 2012, Medellin, Colombia. (Article in Spanish). Available here