OSPF/Summarization and redistribution complex example - MikroTik Wiki
To summarize or not to summarize that's the question? Tools to summarize or filter routes in an OSPF domain - iNETZERO : iNETZERO
OSPF route summarization | CCNA
OSPF route summarization
OSPF summarization - Support Ashmil
CCNAS :Multi Area OSPF
Example for Configuring Route Summarization in an OSPF Area - AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 CLI-based Typical Configuration Examples - Huawei
OSPF Route Summarization - Junos
Route Summarization in OSPF using Cisco Routers - YouTube