Cook, OF (1901) The origin and distribution of the cocoa palm. Contr US Natn Herb 7, 257-293.

Kupfer, E.M. (1901) Imperfect coconuts. Journal New York Botanical Garden 2(7) 69-72.

Preuss, P. (1901) Expedition nach Central- und Sud-Amerika. Berlin. 452pp.

Werth, E. (1901) Die vegetation de insel Sansibar. Berlin. pp78-81 deal with coconut.

Winton, A.L. (1901) The anatomy of the fruit of Cocos nucifera. Am. J. Sci. 4, 265-280. [or 12 (70) 265-280]