Jatinderkumar R. Saini and  Apurva A. Desai,  Analysis of Classifications of Unsolicited Bulk Emails.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2010, vol. 37(1). 115 - 119
    [viewed 23 October 2019]. Available from: https://publications.waset.org/pdf/3811.