B. P. Chacon, S. R. da Silva, G. F. Silveira, and M. A. Delgado, “Ultrasound-Guided Bilateral Superior Laryngeal Nerve Block for Laryngospasm Prophylaxis in a Child with COVID-19: A Clinical Case Report”, Braz J Case Rep., vol. 6, no. 1, p. bjcr156, Jan. 2026.