Shaoan Cheng; Defeng Xing; Douglas F. Call; Bruce E. Logan (March 26, 2009). "Direct Biological Conversion of Electrical Current into Methane by Electromethanogenesis". Environ. Sci. Technol. 43 (10): 3953–8. Bibcode:2009EnST...43.3953C. doi:10.1021/es803531g. PMID19544913.
Shaoan Cheng; Defeng Xing; Douglas F. Call; Bruce E. Logan (March 26, 2009). "Direct Biological Conversion of Electrical Current into Methane by Electromethanogenesis". Environ. Sci. Technol. 43 (10): 3953–8. Bibcode:2009EnST...43.3953C. doi:10.1021/es803531g. PMID19544913.
Shaoan Cheng; Defeng Xing; Douglas F. Call; Bruce E. Logan (March 26, 2009). "Direct Biological Conversion of Electrical Current into Methane by Electromethanogenesis". Environ. Sci. Technol. 43 (10): 3953–8. Bibcode:2009EnST...43.3953C. doi:10.1021/es803531g. PMID19544913.