Dobano, Lucy Amigo. “The Relevance Of The Expiration-Effect Of Derivative Instruments From Ibex-35 Index On The Stock Market In Spain”. International Business & Economics Research Journal (IBER) 2, no. 4 (April 1, 2003). Accessed July 17, 2024. https://clutejournals.com/index.php/IBER/article/view/3783.