1. A ring-20 chromosome;Atkins, L.; Miller, W.L.; Salam, M.;Journal of Medical Genetics,1972
2. Ring F chromosome mosaicism (46, XY,20r/46, XY) in an epileptic child without apparent hematological disease;Faed, M.; Morton, H.G.; Robertson, J.;Journal of Medical Genetics,1972
3. Comparative behavior of ring chromosomes;Kistenmacher, M.L.; Punnett, H.H.;American Journal of Human Genetics,1970
4. Two patients with a 46, XX, Er chromosome constitution;Leisti, J.; Gripenberg, U.; Kivalo, E.; Palo, J.; von Schoulz, B.; Suomalainen, E.;Acta Paediatrica Scandinavica,1968
5. Ring formation of chromosomes Nos;Uchida, I.A.; Lin, C.C.;Cytogenetics,1972