Piliposyan, T.V. “SPP REAL-TIME AND DAY-AHEAD ENERGY MARKETS”. Proceedings of the YSU A: Physical and Mathematical Sciences 52, no. 1 (245) (April 16, 2018): 64–67. Accessed May 19, 2024. https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol52_no1_2018_pp064-067.