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Seung Chang Lee; Sang Whan Han. (2002). Neural-network-based models for generating artificial earthquakes and response spectra. Computers & Structures, 80(20-21), 1627–1638. doi:10.1016/s0045-7949(02)00112-8 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research