Barriocanal Lozano, Carles, et al. “Synoptic Situation on Long-Step Night Migration by a Reed Warbler (Acrocephalus Scirpaceus) on Outward Migration”. Revista Catalana d’Ornitologia, vol. 19, July 2007, pp. 30-34, https://raco.cat/index.php/RCOrnitologia/article/view/72743.