Casamayor, E.O. In Situ Assessment on the Physiological State of Purple and Green Sulfur Bacteria through the Analyses of Pigment and 5S rRNA Content. [electronic resource] - Microbial ecology Oct 2001 - 427-437 p. digital Publication Type: Journal Article ISSN: 1432-184X Standard No.: 10.1007/s002480000068 doi