Low doses effect in GaP light-emitting diodes - O. M. Hontaruk; O. V. Konoreva; Ye. V. Malyi; I. V. Petrenko; M. B. Pinkovska; O. I. Radkevych; V. P. Tartachnyk (Semiconductor Physics, Quantum Electronics and Optoelectronics, 2016)