@article{article869726c1,
title   = {Distance protection algorithm for multiterminal HVDC systems using the Hilbert–Huang transform},
author = {Freitas, Vinícius Albernaz Lacerda and Monaro, Renato Machado and Campos-Gaona, David and Coury, Denis Vinicius and Anaya-Lara, Olimpo},
year = {2020},
doi = {10.1049/iet-gtd.2019.1551},
journal   = {IET Generation, Transmission and Distribution}
}