On the Complexity of Gap-[2]-vertex-labellings of Subcubic Bipartite Graphs. - Celso A. Weffort-Santos; C. N. Campos; Rafael C. S. Schouery (LAGOS, 2019)

Graphs without gap-vertex-labellings: Families and bounds. - Celso A. Weffort-Santos; Rafael C. S. Schouery (Discret. Appl. Math., 2023)