Greek Orthodox Church Hymns Recognition Using Deep Learning Techniques. - Nikolaos Tsakatanis; Lazaros Alexios Iliadis; Achilles D. Boursianis; Konstantinos-Iraklis D. Kokkinidis; Georgios Patronas; Pavlos Serafeim; Maria S. Papadopoulou; Sotirios K. Goudos (MOCAST, 2023)