2Lawton J W, faubion J M. Measuring kernel hardness using the Tangential Abrasive Dehulling Device [ J ]. Cereal Chemistry, 1989 (66) : 519 -524.
3Teotia M S. Some Engineering Properties of Pumpkin( Cucurbitu moschata) Seeds[ J]. Journal of Food Engineering, 1989(9) :153 - 162.
4Dedio, W and dorrell, D G. Factors affecting the hullability and physical characteristics of sunflower achenes [ J ]. Canadian Institute of Food Science and Technology Journal,1989(22) :143 -146.
5T O Omobuwajo,L A Sanni,J O Olajide. Physical properties of ackee apple( Blighia sapida) seeds [ J ]. Journal of Food Engineering, 2000 (45) :43- 48.