1. There have also been a number of suggestions to filter out market wide risk on options by indexing the exercise price. James Angel and Douglas McCabe;J. of Accounting Research,1986
2. Market-Controlled Stock Options: A New Approach to Executive Compensation;Aighe Akhibe;J. OF APPLIED CORP. FINA,1996
3. Business Strategy, Performance Measurement and Compensation;M Ubelhart;CORP. FIN. J,1985