Pradip Kundu and Samarjit Kar and Manoranjan Maiti, Some Solid Transportation Models with Crisp and Rough Costs. journal = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology. January 2013, vol. 73(1). 14 - 21 [viewed 23 September 2024]. Available from: https://publications.waset.org/pdf/4878.