1. Abbott, J. A., G. S. Bachman, N. F. Childers, J. V. Fitzgerald and F. J. Matusik. 1968. Sonic technique for measuring texture of fruits and vegetables. Food Technol. 22: 635–646.
2. Abbott, J. A. and F. R. Harker. 2004. Texture. In: The commercial storage of fruits, vegetables and florist and nursery stocks. USDA. ARS. Agriculture Handbook Number 66.
3. TURGOR AND TEMPERATURE EFFECTS ON DYNAMIC FAILURE PROPERTIES OF POTATO TUBER TISSUE
4. Effect of Temperature on Firmness of Raw Fruits and Vegetables
5. Chen, P. 1996. Quality evaluation technology for agricultural products. Proceedings of the international conference on agricultural machinery engineering. p. 171–204. Seoul Korea.