K. Bechev, N. Yotova, D. Markov, A. Fasova, and S. Markov, “Anatomical variants of the nasal cavity and paranasal sinuses in clinical and surgical practice”, AMB, vol. 53, no. Suppl 1, pp. 142–154, Feb. 2026, doi: 10.2478/AMB-2026-0025.