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Oliveira, Paulo; Marquis, Robert . (2002). The Cerrados of Brazil (Ecology and Natural History of a Neotropical Savanna) || 6. Vegetation Physiognomies and Woody Flora of the Cerrado Biome. , 10.7312/oliv12042(), 91–120. doi:10.7312/oliv12042-007 

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