1. Anuario de estadisticas vitales. Nacimientos y defunciones;INEC,1993
2. National Cancer Registry. Sociedad de Lucha contra el Cáncer;SOLCA,1992
3. Genetics in Medicine;Thompson,1991
4. A study on lymphocytes of neuroblastoma patients;Vernole;Cancer Genet Cytogenet,1988
5. The Chromosomes in Human Cancer and Leukemia;Sandberg,1990