1. Physical and chemical tests related to sensory properties of foods;Amerine,1965
2. Instrumental and sensory analysis of tomato flavor;Baldwin;HortScience,1995
3. Reif und fest: stevige impuls voor ronde tomaat;Boonekamp;Groenten en Fruit/Glasgroenten,1994
4. Boehringer Mannheim GmbH, Biochemica (Mannheim Deutschland), 1986. Methoden der biochemischen Analytik und Lebensmittelanalytik, pp. 37–38.
5. Designing products for individual customers;Booth,1990