Marian, Daniela. “Functions With Bounded E-D-Variation on Undirected Tree Networks”.
Rev. Anal. Numér. Théor. Approx.
31, no. 2 (August 1, 2002): 179–186. Accessed April 11, 2025.
https://ictp.acad.ro/jnaat/journal/article/view/2002-vol31-no2-art8
.