WASET
    Lin Yang and  Zhian Mi and  Jiacheng Xiao and  Rong Li,  Machine Learning for Music Aesthetic Annotation Using MIDI Format: A Harmony-Based Classification Approach.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2021, vol. 175(7). 423 - 427
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10012124.