M. P. Gorishnyi, Determination of the Urbach energy E_u and the optical band gap E_g of submicron C₆₀ and C₇₀ fullerene films , Low Temp. Phys. 51, 174–181, (2025) [Fiz. Nyzk. Temp. 51, 192–200, (2025)] DOI: https://doi.org/10.1063/10.0034899.