Led InGaN/GaN structures with short-period superlattice grown on flat and patterned sapphire substrates / I. S. Romanov, I. A. Prudaev, V. N. Brudnyi [et.al.] // Russian physics journal. 2015. Vol. 57, № 11. P. 1604-1608. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000532341