WASET
    Fabio Fabris and  Alex A. Freitas,  Meta-Learning for Hierarchical Classification and Applications in Bioinformatics.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2018, vol. 139(7). 535 - 545
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/10009269.