Mohamed Amine Ouddan and  Hassane Essafi,  A Multilanguage Source Code Retrieval System Using Structural-Semantic Fingerprints .   journal   = {International Journal of Computer and Systems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2007, vol. 3(3). 575 - 580
    [viewed 18 January 2022]. Available from: https://publications.waset.org/pdf/12393.