RT Journal Article SR Electronic T1 On the Accounting Valuation of Employee Stock Options JF The Journal of Derivatives FD Institutional Investor Journals SP 8 OP 24 DO 10.3905/jod.1995.407933 VO 3 IS 1 A1 Mark Rubinstein YR 1995 UL https://pm-research.com/content/3/1/8.abstract AB