In-plane strain states of standard and flip-chip GaN epilayersZ. Y. Zuo, D. Liu, R. J. Wang, S. B. Qin, H. Liu and X. G. XuEur. Phys. J. Appl. Phys., 54 1 (2011) 10101DOI: https://doi.org/10.1051/epjap/2011100454