María-Dolores Cubiles-de-la-Vega and  Rafael Pino-Mejías and  Esther-Lydia Silva-Ramírez,  Clustering Multivariate Empiric Characteristic Functions for Multi-Class SVM Classification.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2012, vol. 64(4). 380 - 384
    [viewed 04 May 2024]. Available from: https://publications.waset.org/pdf/15061.