Vertex-magic trees with n central vertices and kn leaves have bounded order for each k exceeding the square root of 3. - Jonathan Calzadillas; Dan McQuillan (Bull. ICA, 2023)

Every even cycle of order at least 8 has a mirror labeling. - Jonathan Calzadillas; Dan McQuillan; James M. McQuillan (Discret. Math., 2025)