http://yumianfeilong.com/2008/12/24/understand-shared-pool/

http://www.juliandyke.com/Presentations/LibraryCacheInternals.ppt

http://www.oracle.com/technology/products/manageability/database/pdf/ow05/PS_S003_274003_106-1_FIN_v2.pdf

http://www.eygle.com/archives/2004/10/shared_pool-1.html