Ivanov, Krasimir Marinov, Tsviatko Kolev Varbov, and Georgi Tsonev Velev. 2017. “CALCULATION OF LOSSES OF ACTIVE POWER AND ENERGY IN TRANSMISSION LINES AND TRANSFORMERS, AS A PART OF THE ELECTRICAL DISTRIBUTION POWER NETWORK”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June): 107-10. https://doi.org/10.17770/etr2017vol3.2657.