Zuraida Alwadood and  Adibah Shuib and  Norlida Abd Hamid,  Mathematical Rescheduling Models for Railway Services.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2013, vol. 80(8). 1304 - 1309
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/16173.