If anyone needs a reference describing this sleep position the following document exactly the positon that has been described here: 

Ball, Helen L (2006)  Parent-Infant Bed-sharing Behavior: effects of feeding type, and presence of father. Human Nature: an interdisciplinary biosocial perspective 17(3): 301-318
Available online at http://www.dur.ac.uk/sleep.lab/publications/?mode=pdetail&did=89&pdetail=25305

Also reviewed and summarised in McKenna, James J., Ball, Helen L. & Gettler, Lee T. (2007) Mother–Infant Cosleeping, Breastfeeding and Sudden Infant Death Syndrome: What Biological Anthropology Has Discovered About Normal Infant Sleep and Pediatric Sleep Medicine. Yearbook of Physical Anthropology 50: 133-161.
http://onlinelibrary.wiley.com/doi/10.1002/ajpa.20736/abstract or http://www.dur.ac.uk/sleep.lab/projects/completed/behaviour/

Dr Helen Ball, Professor of Anthropology & Wolfson Research Inst. Fellow
Director of Postgraduate Studies, Sleep Lab Director,
Durham University, Dawson Building, South Road, Durham, DH1 3LE, UK 
www.dur.ac.uk/sleep.lab; 

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