Ihssen, J., Horn, M. A., Matthies, C., Gößner, A., Schramm, A., & Drake, H. L. (2003). N(2)O-Producing Microorganisms in the Gut of the Earthworm Aporrectodea caliginosa Are Indicative of Ingested Soil Bacteria. American Society for Microbiology.

Ihssen, Julian, Marcus A. Horn, Carola Matthies, Anita Gößner, Andreas Schramm, و Harold L. Drake. N(2)O-Producing Microorganisms in the Gut of the Earthworm Aporrectodea Caliginosa Are Indicative of Ingested Soil Bacteria. American Society for Microbiology, 2003.

Ihssen, Julian, et al. N(2)O-Producing Microorganisms in the Gut of the Earthworm Aporrectodea Caliginosa Are Indicative of Ingested Soil Bacteria. American Society for Microbiology, 2003.