1. F. Salamanca (Ed.), Citogenética Humana, 1a Edición, Editorial Médica Panamericana, Mexico, 1990, pp. 117–128.
2. Origin of extra chromosome 21 in 343 families: cytogenetic and molecular approaches;Dagna;Am. J. Med. Suppl.,1990
3. DS: characterization of a case with partial trisomy of chromosome 21 owing to a paternal balanced translocation (15;21)(q26;q22.1) by FISH;Nadal;J. Med. Genet.,1997
4. Parental origin and meiotic stage of non-disjunction in 139 cases of trisomy 21;Ballesta;Ann. Genet.,1999
5. R. McKinlay, G. Sutherland (Eds.), Chromosome abnormalities and Genetic counseling, DS: Other Full Aneuploidies, and Polyploidy, Oxford University Press, New York, 1996, pp. 244–335.