@article {liu2019control,
	title = {Control strategies to improve stability of LCC-HVDC systems with multiple MMC taps},
	journal = {IET Generation, Transmission \& Distribution},
	volume = {13},
	number = {20},
	year = {2019},
	pages = {4685{\textendash}4693},
	publisher = {IET Digital Library},
	author = {Liu, Dalu and Kish, Gregory J and Azad, Sahar Pirooz}
}