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Cao, Xiaodong; Liu, Junjie; Jiang, Nan; Chen, Qingyan . (2014). Particle image velocimetry measurement of indoor airflow field: A review of the technologies and applications. Energy and Buildings, 69(), 367–380. doi:10.1016/j.enbuild.2013.11.012 

An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research