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Rodionov, E. I.; Kovaleva, A. A.; Zorina, A. D.; Starova, G. L.; Trifonov, R. E. . (2018). Synthesis of 2-Mono- and 2,2-Bis[2-(1H-tetrazol-5-yl)ethyl] Derivatives of Dipterocarpol. Russian Journal of Organic Chemistry, 54(3), 485–489. doi:10.1134/S107042801803017X 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research