Alemany, Francisco, and Federico Álvarez. “Determination of Effective Effort on Hake Merluccius Merluccius in a Mediterranean Trawl Fishery”. Scientia Marina 67, no. 4 (December 30, 2003): 491–499. Accessed April 26, 2024. https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/519.