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Allmendinger, Richard W.; Ramos, Victor A.; Jordan, Teresa E.; Palma, Miguel; Isacks, Bryan L. . (1983). Paleogeography and Andean structural geometry, northwest Argentina. Tectonics, 2(1), 1–16. doi:10.1029/tc002i001p00001 

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