Parvaneh Shabanzadeh and  Malik Hj Abu Hassan and  Leong Wah June and  Maryam Mohagheghtabar,  Using Pattern Search Methods for Minimizing Clustering Problems.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    February 2010, vol. 38(2). 325 - 329
    [viewed 23 September 2024]. Available from: https://publications.waset.org/pdf/1125.