SOLID-STATE ELECTRONICS, vol. 152, page. 53 - 57, 2019-02
SOLID-STATE ELECTRONICS, vol. 137, page. 22 - 28, 2017-11
Japaness Journal of Applied Physics, vol. 51, no. 6, page. 6FB06, 2012-06
JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 49, no. 6, 2010-01