Schulze-Makuch, Dirk; Grinspoon, David H.; Abbas, Ousama; Irwin, Louis N.; Bullock, Mark A. «A Sulfur-Based Survival Strategy for Putative Phototrophic Life in the Venusian Atmosphere.». Astrobiology, 4, març 2004, pàg. 11–18. Bibcode: 2004AsBio...4...11S. DOI: 10.1089/153110704773600203. PMID: 15104900.
Schulze-Makuch, Dirk; Grinspoon, David H.; Abbas, Ousama; Irwin, Louis N.; Bullock, Mark A. «A Sulfur-Based Survival Strategy for Putative Phototrophic Life in the Venusian Atmosphere.». Astrobiology, 4, març 2004, pàg. 11–18. Bibcode: 2004AsBio...4...11S. DOI: 10.1089/153110704773600203. PMID: 15104900.
Schulze-Makuch, Dirk; Grinspoon, David H.; Abbas, Ousama; Irwin, Louis N.; Bullock, Mark A. «A Sulfur-Based Survival Strategy for Putative Phototrophic Life in the Venusian Atmosphere.». Astrobiology, 4, març 2004, pàg. 11–18. Bibcode: 2004AsBio...4...11S. DOI: 10.1089/153110704773600203. PMID: 15104900.