Tellurium effect on degradation stability of semiinsulating gallium arsenide crystals - M. I. Kliui; A. I. Liptuha; V. B. Lozinskyi; A. P. Oksanych; S. E. Prytchyn; F. V. Fomovskyi; V. O. Yukhymchuk (Ukrainian Journal of Physics, 2014)