http://pages.stern.nyu.edu/~adamodar/pdfiles/country/option.pdf
Chapter THE OPTIONS TO EXPAND AND ABANDON: VALUATION IMPLICATIONS by Damadaran
Damodaran online - free stuff on valuation, risk, investments, etc
Spreadsheets to check out about modeling options
Valuation of Patents presentation pdf
Valuing the Real Option of Abandoning Unprofitable Custorners When Calculating Customer Lifetime Value
