Kochukov, O., Mutule, A., Krishans, Z., & Oleinikova, I. (2011). Model for Technical-Economic Analysis of ENTSO-E and IPS/UPS Power System Optimal Interconnection Concepts. Electrical, Control and Communication Engineering, 28(1), 15-18. https://doi.org/10.2478/v10144-011-0002-1