Malekpoor, H., Chalvatzis, K., Mishra, N., Mehlawat, M. K., Zafirakis, D., & Song, M. (2018). Integrated grey relational analysis and multi objective grey linear programming for sustainable electricity generation planning. Annals of operations research, 269(1-2), 475–503. https://doi.org/10.1007/s10479-017-2566-4