1. Baiulescu GE, Dumitrescu P, Zugrãvescu PGh (1991) Sampling. Ellis Horwood, Chichester, p 34
2. Buracu O (ed) (1978) Geochemical prospecting of mineral ores. Ed. Tehnica, Bucureşti, p 246
3. Conway RA (1993) Environmental risk analysis for chemicals. Krieger Publishing Company, Florida, p 326
4. Comitetul Naţional pentru Ştiinţăşi Tehnologie, Romanian Standard. Institutul Român de Standardizare, STAS 4706–88, Bucureşti
5. Haiduc I (1940) Gold history in Romania. Imprimeriile “Adevarul” S.A., Bucureşti, p 7