2004, High intensity physical group training in water–an effective training modality for patients with COPD
Wadell K, Sundelin G, Henriksson-Larsén K, Lundgren R Respir Med. 2004 May;98(5):428-38 Respir Med. 2004 May;98(5):428-38
2013, Water-based exercise training for chronic obstructive pulmonary disease
McNamara RJ, McKeough ZJ, McKenzie DK, Alison JA Cochrane Database Syst Rev. 2013 Dec 18;(12):CD008290. doi: 10.1002/14651858.CD008290.pub2 https://www.ncbi.nlm.nih.gov/pubmed/24353107
1971, Alveolar-arterial oxygen, pressure difference in man immersed up to the neck in water
Cohen R., et.al. J.appl.Physiol. 30:720 (1971)