1. P. Gy, Sampling of Particulate Materials Theory and Practice. First edition (1979), Second revised edition (1982), Elsevier, Amsterdam xvii, 431 pp.
2. P. Gy, Sampling for Analytical Purposes. Wiley, Chichester. April 1998 150 pp. Second edition (June 1999).
3. Pierre Gy's sampling theory and sampling practice;Pitard,1993