1. Standard Practice for Description and Identification of soils (Visual-Manual Procedure), ASTM Designation D 2488-93, PA;American Society for Testing and Materials (ASTM),1998
2. The use of classifiers in morphological analysis of particulates;Beddow;Journal of Powder & Bulk Solids Technology,1977
3. The strength and dilatancy of sands;Bolton;Geotechnique,1986
4. Particle Shape Characterisation using Fourier Analysis. CUED/D-Soils/TR315;Bowman,2000
5. Shape Descriptors plugin in ImageJ;Chinga,2006