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Waltraud Schulze, Wolf B. Frommer, John M. Ward: Transporters for ammonium, amino acids and peptides are expressed in pitchers of the carnivorous plant Nepenthes. In: The Plant Journal. Bd. 17, Nr. 6, 1999, ISSN0960-7412, S. 637–646, doi:10.1046/j.1365-313X.1999.00414.x.
Marlis A. Merbach, Georg Zizka, Brigitte Fiala, Dennis Merbach, Webber E. Booth, Ulrich Maschwitz: Why a carnivorous plant cooperates with an ant – Selective defense against pitcher-destroying weevils in the myrmecophytic pitcher plant Nepenthes bicalcarata Hook f. In: Ecotropica. Bd. 13, Nr. 1, 2007, ISSN0949-3026, S. 45–56.
Charles M. Clarke: The effects of pitcher dimorphism on the metazoan community of the carnivorous pitcher plant Nepenthes bicalcarata Hook. f. In: Malayan Nature Journal. Bd. 50, 1997, ISSN0025-1291, S. 149–157.