AIP Conference Proceedings [AIP Publishing PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018) - Depok, Indonesia (30–31 October 2018)] PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018) - Further analysis on volatility function selection for simulating European option prices under Ornstein-Uhlenbeck stochastic volatility assumption