Method of fabricating brown coal briquets with humate conversion to humic acid : Petrova, G. I. and Khudyakova, I. G. Russ, RU 2,173,697 (Cl. C10L5/04), 20 Sep 2001, Appl. 99,122,190, 22 Oct 1999. (In Russian)

Zdroj: In Fuel and Energy Abstracts 2003 44(3):137-137
Databáze: ScienceDirect