Kovalyov, O., et al. “PHENOTYPIC SHIFT OF ADENOCARCINOMA TO SQUAMOUS CELL CARCINOMA OF RECTUM AFTER NEOADJUVANT CHEMORADIOTHERAPY WITH DETECTION OF HPV16: A CLINICAL CASE”. Experimental Oncology, vol. 48, no. 2, Aug. 2026, pp. 172-80, doi:10.15407/exp-oncology.2026.02.172.