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2. Gruppo di Lavoro della Ricerca Policentrica Longitudinale ostetrico-pediatrica: standard del peso del neonato italiano;Riv Ital Pediatr,1980
3. Curve trasversali dell' accrescimento fetale;Nicolini;Minerva Ginecol,1986
4. Ultrasonic measurements of fetal abdomen circumference in the estimation of fetal weight;Campbell;Br J Obstet Gynaecol,1975
5. The estimation of fetal weight by computer-assisted analysis;Warsof;AM J OBSTET GYNECOL,1977