Silalahi, Bib Paruhum, Eko Sulistyono, and Fahren Bukhari. 2022. “Paradox in The D-Dimensional Fixed Charge Transportation Problem and Algorithm for Finding The Paradox”. Pakistan Journal of Statistics and Operation Research 18 (2), 329-36. https://doi.org/10.18187/pjsor.v18i2.2807.