1. Geostandards Newsletter Vol. XVIII;Govindaraju,1994
2. New reference samples of magmatic rocks: quartz diorite SKD-1 and sviatonossite SSv-1;Petrov;Geostandards Newsl.,1996
3. Reference samples of substance compositions. Interlaboratory certification procedure. State standard 8.532–85. Publisher of Standards (1985) 15 pp. (in Russian)
4. P.J. Potts, M. Thompson, J.S. Kane, L.L. Petrov, GeoPT7—an international proficiency test for analytical geochemistry laboratories, Report on round 7 (GBPG-1 Garnet-biotite plagiogneiss). International Association of Geoanalysts (unpublished report).
5. GeoPT1, International Proficiency Test for Analytical Geochemistry Laboratories—Report on Round 1 (July );Thompson;Geostandards Newsl.,1996