Ivaylo I. Atanasov and  Evelina N.Pencheva,  A Mark-Up Approach to Add Value.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2008, vol. 14(2). 504 - 509
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/11480.