Rottloff, C. Paetz, I. Hilke, M. Raessler & A. Mithöfer 2012. Secreted pitfall-trap fluid of carnivorous Nepenthes plants is unsuitable for microbial growth
York Times. 1966-02-24. Knowles, Clayton. Big Trade Center Called Bird Trap (PDF). The New York Times. 1967-03-16 [2019-08-15]. (原始内容 (PDF)存档于2021-04-24)