Turrentine JE (2003) Clinical Protocols in Obstetrics and Gynecology, Second Edition.  
The Parthenon Publishing Group, New York.
Alistair G.S. Philip AGS & Saigal S. When Should We Clamp the Umbilical Cord?
NeoReviews Vol.5 No.4 2004 e142 (© 2004 American Academy of Pediatrics)
http://neoreviews.aappublications.org/cgi/content/full/5/4/e142
Online at
http://placentalrespiration.net/
From the bibliography for
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http://neoreviews.aappublications.org/cgi/content/full/5/4/e142