Majid Forghani and  Michael Khachay,  Feature Extraction Technique for Prediction the Antigenic Variants of the Influenza Virus.   journal   = {International Journal of Medical and Health Sciences}, [online]. World Academy of Science, Engineering and Technology.
    October 2018, vol. 143(11). 525 - 530
    [viewed 21 February 2020]. Available from: https://publications.waset.org/pdf/10009766.