Links
Regulations
This page lists many regulations applicable to the payment of overtime.
http://www.dol.gov/dol/allcfr/ESA/Title_29/Part_778/toc.htm
You can find the federal law that applies in this case here.
http://www.dol.gov/esa/regs/statutes/whd/allfair.htm
Large Damage Awards in Other Lawsuits
Plantiffs won case against Wal-Mart for unpaid overtime.
http://www.cbsnews.com/stories/2002/12/20/national/main533818.shtml
Two Big Settlements In California Overtime Lawsuits.
http://www.lawyersandsettlements.com/articles/00692/california-overtime.html
General Links
Other law firm's advice to businesses on the dangers of failing to pay overtime.
http://www.businessknowhow.com/manage/overtime.htm