RFC 4291:IP Version 6 Addressing Architecture
RFC-Ref

Inter-domain Routing


Click on the red underlined text to get to the source

... way IPv4 address prefixes are written in Classless Inter-Domain Routing (CIDR) notation [CIDR]. An IPv6 address ...
... bit-length, similar to IPv4 addresses under Classless Inter-Domain Routing. There are several types of unicast addresses ...


... Fuller, V., Li, T., Yu, J., and K. Varadhan, "Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy ...



Google
Web
RFC-Ref