Rujivan, S., Hongsai, P. , Maleewong, M. , Rakwongwan, U. and Boonchot, C. 2020. Stochastic Modeling for SET50 Index in Thailand Using the Black-Scholes Model with A Time-Dependent Drift Parameter and Its Application to SET50 Futures Pricing. Thai Journal of Operations Research : TJOR. 8, 2 (Dec. 2020), 42–50.