“…It is known that Dirichlet boundary conditions roughly approximate the reality. As a consequence, the study of the Cauchy problem under Neumann or Robin boundary conditions has its actuality in the works [1,4,9,16,18,24,25,29]. This work is devoted to the determination of the involved constants for the boundary value problems concerned in the presence of radiative-type conditions on the boundary, which are typical of thermodynamic models evolved from engineering practice [3,13].…”