1. Buslik, D. Mixing and Sampling with special Reference to Multi sized Granular Material Amer. Soc. Testing Mats. Bull. No. 165 (1950), S. 66
2. Gy, P. Echantillonnage pour une analyse granulometrique Annales des Mines 145 (1956) 4, 37/42
3. Haruby, N. The estimation of the variance of samples withdrawn from a random mixture of Multisized particles The Chem. Eng. (1967) 12, CE 270/CE 271
4. Hutschenreiter, W. Fehlerfortpflanzung bei der Probenahme Bergakademie 17 (1965) 9, 537/542
5. Kristensen, H. G. Statistical properties of random and nonrandom mixtures of dry solids (Pt 1 and Pt 2) Powder Technol. 7 (1973) 5, 249/257 8 (1973) 3/4, 149/157