1. Risk for trisomy 21 in offspring of individuals who have relatives with trisomy 21;Abuelo;Am. J. med. Genet.,1986
2. Evidence for genetic control of non-disjunction in man;Alfi;Am. J. hum. Genet.,1980
3. Marker chromosomes in parents to children with Down's syndrome;Annerén;Clin. Genet.,1984
4. Analysis of DNA haplotypes suggest a genetic predisposition to trisomy 21 associated with DNA sequences on chromosome 21;Antonarakis,1985
5. Reduced recombination rate on chromosomes 21 that have undergone nondisjunction;Antonarakis,1986