@article {leterme2018hvdc,
	title = {HVDC grid protection algorithm design in phase and modal domains},
	journal = {IET Renewable Power Generation},
	volume = {12},
	number = {13},
	year = {2018},
	pages = {1538{\textendash}1546},
	publisher = {IET Digital Library},
	author = {Leterme, Willem and Azad, Sahar Pirooz and Van Hertem, Dirk}
}
