Thermal and Hydrolytic Stability of Dithiophophoric Acids S. K. Ivanov, C. Karshalykov, N. R. Litovchenko and G. G. Kupko Rev. Inst. Fr. Pét., 48 1 (1993) 43-52 Published online: 01 November 2006 DOI: 10.2516/ogst:1993003