Alexiev, F.; Kalpachka, D.; Sakelarova, T.; Gabrovsky, N.; Dimitrova, D.; Iliev, D.; Axentieva, Y.; Hasan, B.; Kalpachki, R. Initial Neurological Symptoms Associated With COVID-19 During the First Outbreak in Bulgaria. C. R. Acad. Bulg. Sci. 2024, 77, 760–765.