"sulfur monoxide (CHEBI:45822)". Chemical Entities of Biological Interest. UK: European Bioinformatics Institute. Archived from the original on 7 July 2013. Retrieved 5 May 2012.
"sulfur monoxide (CHEBI:45822)". Chemical Entities of Biological Interest. UK: European Bioinformatics Institute. Archived from the original on 7 July 2013. Retrieved 5 May 2012.