A. K.  van Setten and Koek-Noorman, J., Fruits and seeds of Annonaceae: morphology and its significance for classification, vol. 17. Stuttgart: E. Schweizerbart'sche Verlagsbuchhandlung (Nägele u. Obermiller), 1992, p. 101.

A. K.  van Setten and Koek-Noorman, J., Fruits and seeds of Annonaceae: morphology and its significance for classification, vol. 17. Stuttgart: E. Schweizerbart'sche Verlagsbuchhandlung (Nägele u. Obermiller), 1992, p. 101.