Andriani, D. P., Sugiono, S., Kusuma, L. T. W. N., Tuhfah, R. A. and Ardiansah, M. R. (2025) “Optimization of pricing and ordering decisions under duopoly competition for new and remanufactured products in a circular supply chain”, Eastern-European Journal of Enterprise Technologies, 2(3 (134), pp. 47–54. doi: 10.15587/1729-4061.2025.325177.