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Javier Sosa-Escalante, Silvia Hernández, Augusto Segovia and Victor Sanchez-Cordero. (1997). First Record of the Coyote, Canis latrans (Carnivora: Canidae), in the Yucatan Peninsula, Mexico. The Southwestern Naturalist, 42(4), 494–495. doi:10.2307/30055316 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research