I.B. Berkutov, V.V. Andrievskii, Yu.F. Komnik, M. Myronov, and O.A. Mironov, Overheating effect and hole-phonon interaction in SiGe heterostructures, Low Temp. Phys. 34, (2008) [Fiz. Nizk. Temp. 34, 1192-1196, (2008)] DOI: https://doi.org/10.1063/1.3009592.