On the total chromatic number of the direct product of cycles and complete graphs Diane Castonguay, Celina M.H. de Figueiredo, Luis A.B. Kowada, Caroline S.R. Patrão, Diana Sasaki and Mario Valencia-Pabon RAIRO-Oper. Res., 58 2 (2024) 1609-1632 Published online: 12 April 2024 DOI: 10.1051/ro/2024045