J Clin Invest. 1936 Jan;15(1):47-61.
THE EFFECTS OF INHALATION OF HELIUM MIXED WITH OXYGEN ON THE MECHANICS OF RESPIRATION.
Barach AL, Eckman M.
Department of Medicine, College of Physicians and Surgeons, Columbia University, New York.
PMID: 16694380 [PubMed]
PMCID: PMC424760