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Chen, Yukun; Fu, Xingfeng; Liu, Lie; Zhang, Ying; Cao, Liming; Yuan, Daosheng; Liu, Pingan . (2018). Millimeter wave absorbing property of flexible graphene/acrylonitrile-butadiene rubber composite in 5G frequency band. Polymer-Plastics Technology and Engineering, (), 1–12. doi:10.1080/03602559.2018.1542714 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research