I used the following search criteria: small business creates 80% of jobs
This WSJ article was close to the top.
http://online.wsj.com/article/SB10001424052970203914304576630973840478808.html
The link,and i think it was here on FR, I am really looking for is the piece that shows that "beyond creating 65-80% of the jobs which we already know" by not including small business people in the tax cut the result is to tank job creation. It may be too fine a point to research.
I should have bookmarked it when I originally found it a few days ago.