By Bhaumik J   Mahadevan S   Davies AE   in Journal of Obstetrics & Gynaecology

ISSN:1364-6893|24|7|817-819

Informa Healthcare‎(2004)‎

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By Chen G   Davies A.E.   in COMPEL: Int J for Computation and Maths. in Electrical and Electronic Eng.

ISSN:0332-1649|15|1|40-56

Emerald Group Publishing Ltd‎(1996)‎

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