Mir Hadi Seyedafsari and  Iraj Hasanzadeh,  Optimal External Merge Sorting Algorithm with Smart Block Merging.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2010, vol. 38(2). 237 - 240
    [viewed 14 April 2021]. Available from: https://publications.waset.org/pdf/9638.