«Status and distribution of Paraguayan ’Black Tyrants’ (Tyrannidae: Knipolegus) with a remarkable new country record». Avocetta 43, no. 2 (dicembre 31, 2019). Consultato luglio 28, 2026. https://test-ojs-unimi-it.archicoop.it/index.php/avocetta/article/view/28541.