Tchernev, G., and S. Kordeva. 2025. “Cheek аdvancement Flap for BCC of the Nose: The Nitrosamine Contamination During the Combined Drug Intake As Important Skin Cancer Triggering Factor”. Acta Medica Bulgarica 52 (Suppl 1): 67-75. https://doi.org/10.2478/AMB-2025-0028.