Schulze-Makuch, Dirk; Grinspoon, David H.; Abbas, Ousama; Irwin, Louis N.; Bullock, Mark A. (March 2004). «A Sulfur-Based Survival Strategy for Putative Phototrophic Life in the Venusian Atmosphere.». Astrobiology4: 11–18. doi:10.1089/153110704773600203. PMID15104900. Bibcode: 2004AsBio...4...11S.
Schulze-Makuch, Dirk; Grinspoon, David H.; Abbas, Ousama; Irwin, Louis N.; Bullock, Mark A. (March 2004). «A Sulfur-Based Survival Strategy for Putative Phototrophic Life in the Venusian Atmosphere.». Astrobiology4: 11–18. doi:10.1089/153110704773600203. PMID15104900. Bibcode: 2004AsBio...4...11S.
Schulze-Makuch, Dirk; Grinspoon, David H.; Abbas, Ousama; Irwin, Louis N.; Bullock, Mark A. (March 2004). «A Sulfur-Based Survival Strategy for Putative Phototrophic Life in the Venusian Atmosphere.». Astrobiology4: 11–18. doi:10.1089/153110704773600203. PMID15104900. Bibcode: 2004AsBio...4...11S.