7Kathleen A. Farrell,Gordon V. Karels,Kenneth W. Montfort,Christine A. McClatchey. Celebrity performance and endorsement value: the case of Tiger Woods, Managerial Finance, 2000,26 (7).
8Brian D. Till, Using celebrity endorsers effectively: lessons from associative learning,Journal of Product and Brand Management, 1998,7 : 400-409.
9J. Fizel, C. R. McNeil, T. Smaby. Athlete Endorsement Contracts: The Impact of Conventional Stars, International Advances in Economic Research, 2008,14(2):257-256.
10Options, Futures, and Other Derivatives, Hulk, John, PrenticoHall, 1997.