dos Santos, V.M., Sugai, K.M. and Nunes, R.C. (trans.) (2026) “Relationships of insomnia with psychosocial factors among medical residents – letter”, Bulgarian Medical Journal, 20(1), pp. 69–70. Available at: https://journals.mu-sofia.bg/index.php/bmj/article/view/805 (Accessed: 30 April 2026).