1. Catalogue of unbalanced chromosome aberrations in man;Schinzel, A.,1984
2. Ring chromosome 7 with variable phenotypic expression;Zackai, E.H.; Breg, W.R.;Cytogenet Cell Genet,1973
3. A fourth case of ring chromosome 7;DeLozier, C.D.; Theintz, G.; Sizonenko, P.; Engel, E.;Clin Genet,1982
4. Cromosomo 7 em anel-relato de um caso;Barros, L.P.; Perez, A.B.A.; Brunoni, D.; Andrade, J.A.D.;Cienc Cult,1986
5. Ring chromosome 11 and cafe-au-lait spots;Fagan, K.; Suthers, G.K.; Hardacre, G.;Am J Med Genet,1988