Aboody D., M. E. Barth, and R. Kasznik. 2004. SFAS No. 123 stock-based compensation expense and equity market values. The Accounting Review 79 (2): 251-275.
Aboody D., M. E. Barth, and R. Kasznik. 2006. Do firms understate stock option-based compensation expense disclosed under SFAS 123? Review of Accounting Studies 11 (4): 429-461.