By Matias A   Montenegro N   Areias JC   in Twin Research

ISSN:1369-0523|3|2|65-70

Australian Academic Press‎(2000)‎

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By Montenegro N.   Matias A.   Areias J.C.   Barros H.   in Ultrasound in Medicine and Biology

ISSN:0301-5629|23|2|171-176

Elsevier‎(1997)‎

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By Montenegro N.   Bernardes J.   Ayres-de-Campos D.   Matias A.   Areias J.C.   in European Journal of Obstetrics and Gynecology and Reproductive Biology

ISSN:0301-2115|64|1|3-6

Elsevier‎(1996)‎

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