Tech-No!: Clock Dividers

Here is a good article for Clock Dividers:

"Clock Dividers Made Easy" - (SNUG Boston 2002 paper)

http://www.scribd.com/doc/6868408/Clock-Dividers

"Unusual Clock Dividers" - (Xilinx article)

http://www.nalanda.nitc.ac.in/industry/appnotes/xilinx/documents/xcell/xl33/xl33_30.pdf