1. V. N. Abakumov, V. I. Perel’, and I. N. Yassievich, Nonradiative Recombination in Semiconductors (Peterb. Inst. Yad. Fiz. AN, St.-Petersburg, 1997; North-Holland, Amsterdam, 1991).
2. A. I. Yakimov, A. V. Dvurechenskii, A. I. Nikiforov, and G. Yu. Mikhalev, JETP Lett. 80, 321 (2004).
3. D. L. Losse, Appl. Phys. Lett. 21, 54 (1972).
4. V. I. Zubkov, C. M. A. Kapteyn, A. V. Solomonov, and D. Bimberg, J. Phys.: Condens. Matter 17, 2435 (2005).
5. Th. Asperger, Ch. Miesner, K. Bruner, and G. Abstreiter, Phys. Status Solidi B 224, 237 (2001).