Hockings KJ. , Bryson-Morrison N, Carvalho S, Fujisawa M, Humle T, McGrew WC. , Nakamura M, Ohashi G, Yamanashi Y, Yamakoshi G, Matsuzawa T (2015) 
Tools to tipple: ethanol ingestion by wild chimpanzees using leaf-sponges
葉っぱを使ってパームワインをのむ野生チンパンジー

Royal Society Open Science, 2: 150150