Milovanović, Gradimir V., and Igor Ž. Milovanović. “Some Results for Convex Sequences of Order \(k\)”. Anal. Numér. Théor. Approx. 12, no. 1 (February 1, 1983): 77–81. Accessed September 3, 2025. https://www.ictp.acad.ro/jnaat/journal/article/view/1983-vol12-no1-art9.