1. Autosomal abnormalities;Smith, D.W.;Am J Obstet Gynecol,1964
2. Prevalence of Edwards' syndrome. Clustering and season variation?;Neilson, J.; Holm, V.; Haahr, J.;Humangenetik,1975
3. Survival in trisomy 18;Carter, P.E.; Pearn, J.H.; Bell, J.; Martin, N.; Anderson, N.G.;Clin Genet,1985
4. Morbidity of trisomy 18 includes delivery by caesarean section;David, T.J.; Glew, S.;Lancet,1980
5. Survival and the sex ratio in trisomy 17-18;Weber, W.W.;Am J Hum Genet,1967