Phạm Minh Tú, dang quoc, vuong and Bùi Đức Hùng 2022. Study of number and size of air-gaps in core of shunt reactors in tranmission lines of high and supper high voltages. Journal of Military Science and Technology. 80 (Jun. 2022), 23–30. DOI:https://doi.org/10.54939/1859-1043.j.mst.80.2022.23-30.