By Mweemba DM   Beck I   Tuffnell DJ   in Journal of Obstetrics & Gynaecology

ISSN:1364-6893|25|2|194-195

Informa Healthcare‎(2005)‎

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By Calvert S.M.   Tuffnell D.J.   Haley J.   in European Journal of Obstetrics and Gynecology and Reproductive Biology

ISSN:0301-2115|64|2|179-184

Elsevier‎(1996)‎

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By Okeahialam M.G.   Tuffnell D.J.   O'Donovan P.   Sapherson D.A.   in European Journal of Obstetrics and Gynecology and Reproductive Biology

ISSN:0301-2115|79|1|89-90

Elsevier‎(1998)‎

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