By Ament L.   in Journal of Nurse-Midwifery

ISSN:0091-2182|44|6|592-599

Elsevier‎(1999)‎

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By Ament L. J. P.   van Veenendaal M.   van den Brink J.   in EPL (EUROPHYSICS LETTERS)

ISSN:0295-5075|95|2|27008-27008

Edp Sciences‎(2011)‎

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