Müller, Achim, Erich Krickemeyer, Hartmut Bögge, and Dieter Rehder. “Discrimination Between S²⁻ and SO²⁻ Sites in Mixed Crystal Compounds Containing Co and Co Mo Clusters by ⁵⁹Co-NMR Spectroscopy, and the Relevance for HDS Catalysis”. CHIMIA 46, no. 9 (September 30, 1992): 386. Accessed April 25, 2024. https://www.chimia.ch/chimia/article/view/1992_386.