1. Representativiness of bulk samples;Abzalov,2013
2. Sampling for Analytical Purposes;Gy,1998
3. Pierre Gy's Sampling Theory and Sampling Practice;Pitard,1993
4. Sampling of Heterogeneous and Dynamic Material Systems: Theories of Heterogeneity;Gy,1992
5. L'Echantillonnage Des Minerais en Vrac, Revue de L, Revue de l'Industrie Minérale, St Etienne;Gy,1971