PETROSYAN, P. A. .; SHASHIKYAN, A. S. . On Interval Total Colorings of Trees. Mathematical Problems of Computer Science, [S. l.], v. 32, p. 70–73, 2021. Disponível em: http://mpcs.sci.am/index.php/mpcs/article/view/367. Acesso em: 6 may. 2024.