M. Belogolovskii, E. Zhitlukhina, and P. Seidel, Probing long-range current-carrying edge modes by two quantum point contacts, Low Temp. Phys. 47, (2021) [Fiz. Nizk. Temp. 47, 1090-1095, (2021)] DOI: https://doi.org/10.1063/10.0007071.