Adjuvant interstitial three-dimensional pulse-dose-rate-brachytherapy for lip squamous cell carcinoma after surgical resection - Chyrek, Artur Jan; Bielęda, Grzegorz Mikołaj; Burchardt, Wojciech Maria; Chicheł, Adam; Wojcieszek, Piotr Andrzej (Journal of Contemporary Brachytherapy, 2019)