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Zupanc, Günther K. H.; Maler, Leonard . (1993). Evoked chirping in the weakly electric fish <i>Apteronotus leptorhynchus</i> : a quantitative biophysical analysis. Canadian Journal of Zoology, 71(11), 2301–2310. doi:10.1139/z93-323 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research