1. Chem. & Ind., 1957, P. 543
2. ‘Cacao Fermentation’, 1937, p. 129 (London: John Bale, Sons & Curnow)
3. & , Cocoa Conference Rep., 1951, p. 73 (London: Cocoa, Chocolate and Confectionery Alliance)
4. Cacao Res. Rep., 1957, p. 54 (Imperial College of Tropical Agriculture, Trinidad)
5. as reference 3, p. 151