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Lotfian, Reza; Gholamnejad, Javad; Mirzaeian Lardkeyvan, Yousef . (2020). Effective solution of the long-term open pit production planning problem using block clustering. Engineering Optimization, (), 1–16. doi:10.1080/0305215X.2020.1771703 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research