1. Intrauterine growth as estimates from live born birthweight data at 24 to 42 weeks gestation;Lubchenco;Pediatrics,1963
2. Nomenclature for duration of gestation, birthweight and intrauterine growth;Silverman;Pediatrics,1967
3. Analysis of the gestational interval;Treloar;Am J Obstet Gynecol,1967
4. Commentary on current World Health Organization definitions used in perinatal statistics;Chiswick;Br J Obstet Gynaecol,1986
5. Definitions used in relation to gestational age;Hall;Paediatr Perinat Epidemio.,1990