1. Fetal nutrition and cardiovascualar disease in adult life;Barker;Lancet,1993
2. The foetal and neonatal development of twins;Naye;Paediatrics,1964
3. The relationship between gestational age and birthweight in pregnancy;Fleigner;Austr NZ J Obs Gynec,1984
4. Growth standards for twins from birth to four years;Wilson;Ann Hum Biol,1974
5. Growth and development of human twins;Wilson,1986