WASET
    Leehter Yao and  Chin-Chin Lin,  Learning of Class Membership Values by Ellipsoidal Decision Regions .   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2007, vol. 1(1). 85 - 89
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/14378.