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Wenhua Hai; Guishu Chong; Jianwen Song. (2008). Stabilities of one-dimensional stationary states of Bose–Einstein condensates. , 372(15), 2558–2562. doi:10.1016/j.physleta.2007.12.029 

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