Yaşar, H. and Ceylan, M. 2022. A NOVEL COMPARATIVE STUDY FOR AUTOMATIC THREE-CLASS AND FOUR-CLASS COVID-19 CLASSIFICATION ON X-RAY IMAGES USING DEEP LEARNING. Malaysian Journal of Computer Science. 35, 4 (Oct. 2022), 376–402. DOI:https://doi.org/10.22452/mjcs.vol35no4.5.