Andueza, Miren, Emilio Barba, Jose L. Arroyo, Jordi Feliu, Jaime Gómez, Fernando Jubete, Luis Lozano, Juan S. Monrós, Rubén Moreno-Opo, Júlio M. Neto, Alejandro Onrubia, Paulo Tenreiro, Thijs Valkenburg, and Juan Arizaga. 2014. “Geographic Variation in Body Mass of First-Year Reed Warblers Acrocephalus Scirpaceus in Iberia”. Ornis Fennica 91 (2):88–99. https://doi.org/10.51812/of.133847.