Xue, L., Farrugia, G., Miller, S. M., Ferris, C. D., Snyder, S. H., & Szurszewski, J. H. (2000). Carbon monoxide and nitric oxide as coneurotransmitters in the enteric nervous system: Evidence from genomic deletion of biosynthetic enzymes. The National Academy of Sciences.

Xue, L., G. Farrugia, S. M. Miller, C. D. Ferris, S. H. Snyder, ja J. H. Szurszewski. Carbon Monoxide and Nitric Oxide As Coneurotransmitters in the Enteric Nervous System: Evidence From Genomic Deletion of Biosynthetic Enzymes. The National Academy of Sciences, 2000.

Xue, L., et al. Carbon Monoxide and Nitric Oxide As Coneurotransmitters in the Enteric Nervous System: Evidence From Genomic Deletion of Biosynthetic Enzymes. The National Academy of Sciences, 2000.