1. Geochemic der Pyrite einiger Lagerstatten der Tschechoslowakei;Cambel;Monographie Vydav Slov. akad. vied. Bratislavia,1967
2. Spectrochemical investigation of sulfide minerals from ores of the Skellett district;Gavelin;Sver. Geol. Undersokn.,1947
3. Die geochemische Bedeutung Von Kobalt und Nikel in Pyrit;Hegeman;Zeit. angew. Mineral.,1943
4. The Phase Relations in Tin-bearing Systems;Nekrasov,1977
5. On the conditions of pyrrhotite mineralization in Abkhasia, as determined by laser microanalysis;Tvalchrelidze;Geokhimiya,1974