V. M. Loktev and V. Turkowski, On the theory of nonhomogeneous nonequilibrium superconductivity in 2D systems with massless fermions, Low Temp. Phys. 48, 371–377, (2022) [Fiz. Nyzk. Temp. 48, 419-426, (2022)] DOI: https://doi.org/10.1063/10.0010200.