1. Coleman R.(1979). An Introduction to Mathematical Stereology.Memoirs No. 3 Dept. of Theoretical Statistics University of Aarhus Aarhus Denmark.
2. Sampling theory for opaque spatial specimens;Davy P. J.;J. R. Statist. Soc. Ser. B,1977
3. Procédé mécanique pour déterminer la composition des roches;Delesse M. A.;C. R. Acad. Sci. (Paris),1847