Try these…
http://wiki.polycount.com/wiki/Subdivision_Surface_Modeling
http://probiner.x10.mx/forum/showthread.php?tid=4
https://forums.newtek.com/showthread.php?98754-Polygon-Table-Help-Building-One
Hope this helps.
EDIT: Forgot to add…
wiki.polycount.com/w/images/4/43/SubdivisionModelingDotCom_The-Pole.pdf