1. Azoospermia and paternal autosomal ring chromosomes: case report and literature review 
Hemashree Rajesh, Mary-Louise Freckmann, Michael Chapman 
Reproductive BioMedicine Online 
Volume 23, Issue 4, Pages (October 2011)
DOI: /j.rbmo
Copyright © 2011 Reproductive Healthcare Ltd. Terms and Conditions

2. Figure 1
Scheme of ring formation and instability after replication, arising from chromatid exchanges or breaks, and originating: (a) two monocentric rings; (b) interlocked rings; (c) a double-sized dicentric ring; and (d) a broken or open ring. Reproduced with permission from Sodre et al. (2010).
Reproductive BioMedicine Online  , DOI: ( /j.rbmo )
Copyright © 2011 Reproductive Healthcare Ltd. Terms and Conditions