Olexandr, B., L. Sergiy, and N. Petro. “Deformation Potentials for Δ1 Minimum of Conduction Band of Single Crystals N-Ge”. JOURNAL OF ADVANCES IN PHYSICS, vol. 5, no. 1, July 2014, pp. 705-11, doi:10.24297/jap.v5i1.1969.