@conference {173841,
	title = {Power System Coherency Identification for Large HVDC-AC Grids},
	booktitle = {CIGRE-IEC 2019 Conference on EHV and UHV (AC \& DC)},
	year = {2019},
	month = {24 April},
	address = {Hakodate, Japan},
	author = {Ahmed M. Khalil and Reza Iravani}
}
