Heat distribution in the rod in presence of external non-stationary source Yu. A. Chirkunov, M. Yu. Chirkunov, V.V. Molodin, A.A. Lapidus and D.V. Topchiy E3S Web of Conf., 458 (2023) 02027 Published online: 07 December 2023 DOI: 10.1051/e3sconf/202345802027