Andrica, Dorin, and Şerban Buzeţeanu. “Relatively Dense Universal Sequences for the Class of Continuous Periodical Functions of Period \(T\)”. Anal. Numér. Théor. Approx. 16, no. 1 (February 1, 1987): 1–9. Accessed May 19, 2024. https://ictp.acad.ro/jnaat/journal/article/view/1987-vol16-no1-art1.