1. Incremental strain rate ratios and strength of sand; in the triaxial test;Barden;Geotechnique,1966
2. Towards the statistical definition of a granular mass;Field,1963
3. Discussion of Rowe 1963;Gibson;Jour. Soil Mech. Found. Engrg., ASCE,1963
4. The behaviour of an assembly of rotund, rigid, cohesionless particles,. Parts, 1 and 2;Horne;Proc. Roy. Soc. A.,1965
5. The behaviour of an assembly of rotund, rigid cohesionless particles,. Part 3;Horne;Proc. Roy. Soc. A.,1969