Marina Maratovna Imasheva, Dina Abdulbarovna Mustafina, Dmitriy Maratovich Yakupov, y Marat Salavatovich Gatin, Lenar Fargatovich Abzalov, Rail Ravilovich Fakhrutdinov. 2019. «The Causes of the Astrakhan Campaign of 1569». Opción 35 (octubre), 807-18. https://www.produccioncientificaluz.org/index.php/opcion/article/view/29510.