Marian, Daniela. “Convex Functions of Order N on Undirected Networks”. Rev. Anal. Numér. Théor. Approx. 29, no. 2 (August 1, 2000): 151–160. Accessed November 22, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2000-vol29-no2-art5.