SHARE Presentation: Migrating to z/OS V1R4, Parts 1 and 2 - page 77, at http://docs.share.org/proceedings/sh100/s2871.pdf.

z/OS V1R4 Migration: Section 5.2.7 - Accomodate deleted GRS exits and, if necessary, use new dynamic exit ISGNQXIT, at http://publib.boulder.ibm.com/cgi-bin/bookmgr/BOOKS/e0z2m101/5.2.7.