G. Karlowatz, E. Ungersböck, W. Wessner, H. Kosina, and S. Selberherr
''Analysis of Hole Transport in Arbitrarily Strained Germanium''
in SiGe and Ge: Materials, Processing, and Devices, D. Harame, et
al. (Eds.), ser. ECS Transactions, vol. 3, no. 7, The Electrochemical Society, 2006, ISBN:
1-56677-507-8, pp. 443 - 450.