RT Journal Article SR Electronic T1 The Valuation of Commodity Contingent Claims JF The Journal of Derivatives FD Institutional Investor Journals SP 27 OP 39 DO 10.3905/jod.1994.407896 VO 1 IS 4 A1 Gonzalo Cortazar A1 Eduardo S. Schwartz YR 1994 UL https://pm-research.com/content/1/4/27.abstract AB