Belvisi, Maria G.; David Stretton, C.; Yacoub, Magdi; Barnes, Peter J. (1992). “Nitric oxide is the endogenous neurotransmitter of bronchodilator nerves in humans”. European Journal of Pharmacology. 210 (2): 221–2. doi:10.1016/0014-2999(92)90676-U. PMID1350993.
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pubmed.ncbi.nlm.nih.gov
Belvisi, Maria G.; David Stretton, C.; Yacoub, Magdi; Barnes, Peter J. (1992). “Nitric oxide is the endogenous neurotransmitter of bronchodilator nerves in humans”. European Journal of Pharmacology. 210 (2): 221–2. doi:10.1016/0014-2999(92)90676-U. PMID1350993.