Jong Woo Kim and  Go Bong Choi and  Sang Hwan Son and  Dae Shik Kim and  Jung Chul Suh and  Jong Min Lee,  Optimal Maintenance and Improvement Policies in Water Distribution System: Markov Decision Process Approach.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2015, vol. 100(4). 277 - 282
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/10000986.