1. Cook L W, Tashima M N, Tabatabai N and Stillman G E 1982J. Cryst. Growth 56 475
2. Dentai A G, Busrus C A, Lee T P, Campbell J C, Copeland J A and Oliver J D 1981GaAs and related compounds, Conf. Ser. No. 63
3. Di Forte Poisson M A, Brylinski C and Duchemin J P 1985Appl. Phys. Lett. 46 476
4. Gatsoev V G, Gruzdov V G, Mamutin V V, Puleaevsky D V, Rakesh Kumar and Stroganov D R 1985All Union Conf on Indium Phosphide in Semiconductor Electronics (Kishinev, USSR)
5. Kuphal E and Pocker A 1982J. Cryst. Growth 58 133