PETROSYAN, P. A. .; KHACHATRYAN, N. A. . Upper Bounds for the Maximum Span in Interval Total Colorings of Graphs. Mathematical Problems of Computer Science, [S. l.], v. 35, p. 19–25, 2021. Disponível em: http://mpcs.sci.am/index.php/mpcs/article/view/281. Acesso em: 1 may. 2024.