AUTHOR=Klotz Martin G., Bryant Donald A., Hanson Thomas E. TITLE=The Microbial Sulfur Cycle JOURNAL=Frontiers in Microbiology VOLUME=2 YEAR=2011 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2011.00241 DOI=10.3389/fmicb.2011.00241 ISSN=1664-302X