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Liu, Xing; Wu, Dun; Fang, Bijun; Ding, Jianning; Li, Xiaobing; Zhao, Xiangyong; Luo, Haosu; Ko, Jae-Hyeon; Ahn, Chang Won . (2015). Aging characteristics of 0.7Pb(Mg1/3Nb2/3)O3–0.3PbTiO3single crystals with different crystal orientations. Applied Physics A, 119(4), 1469–1476. doi:10.1007/s00339-015-9121-4 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research