Computing Vertex-Weighted Multi-Level Steiner Trees. - Faryad Darabi Sahneh; Alon Efrat; Stephen G. Kobourov; Richard Spence (CoRR, 2018)

Approximation Algorithms and an Integer Program for Multi-level Graph Spanners. - Abu Reyan Ahmed; Keaton Hamm; Mohammad Javad Latifi Jebelli; Stephen G. Kobourov; Faryad Darabi Sahneh; Richard Spence (SEA², 2019)

A General Framework for Multi-level Subsetwise Graph Sparsifiers. - Abu Reyan Ahmed; Keaton Hamm; Mohammad Javad Latifi Jebelli; Stephen G. Kobourov; Faryad Darabi Sahneh; Richard Spence (CoRR, 2019)

Multi-level Steiner Trees. - Abu Reyan Ahmed; Patrizio Angelini; Faryad Darabi Sahneh; Alon Efrat; David Glickenstein; Martin Gronemann; Niklas Heinsohn; Stephen G. Kobourov; Richard Spence; Joseph Watkins; Alexander Wolff 001 (ACM J. Exp. Algorithmics, 2019)

Kruskal-Based Approximation Algorithm for the Multi-Level Steiner Tree Problem. - Abu Reyan Ahmed; Faryad Darabi Sahneh; Keaton Hamm; Stephen G. Kobourov; Richard Spence (ESA, 2020)

Weighted Additive Spanners. - Abu Reyan Ahmed; Greg Bodwin; Faryad Darabi Sahneh; Stephen G. Kobourov; Richard Spence (WG, 2020)

Kruskal-based approximation algorithm for the multi-level Steiner tree problem. - Abu Reyan Ahmed; Faryad Darabi Sahneh; Stephen G. Kobourov; Richard Spence (CoRR, 2020)

Graph spanners: A tutorial review. - Abu Reyan Ahmed; Greg Bodwin; Faryad Darabi Sahneh; Keaton Hamm; Mohammad Javad Latifi Jebelli; Stephen G. Kobourov; Richard Spence (Comput. Sci. Rev., 2020)

Approximation Algorithms for Priority Steiner Tree Problems. - Faryad Darabi Sahneh; Stephen G. Kobourov; Richard Spence (COCOON, 2021)

Multi-Level Weighted Additive Spanners. - Abu Reyan Ahmed; Greg Bodwin; Faryad Darabi Sahneh; Keaton Hamm; Stephen G. Kobourov; Richard Spence (SEA, 2021)

On Additive Spanners in Weighted Graphs with Local Error. - Abu Reyan Ahmed; Greg Bodwin; Keaton Hamm; Stephen G. Kobourov; Richard Spence (WG, 2021)

Weighted Sparse and Lightweight Spanners with Local Additive Error. - Abu Reyan Ahmed; Greg Bodwin; Keaton Hamm; Stephen G. Kobourov; Richard Spence (CoRR, 2021)

Multi-priority Graph Sparsification. - Abu Reyan Ahmed; Keaton Hamm; Stephen G. Kobourov; Mohammad Javad Latifi Jebelli; Faryad Darabi Sahneh; Richard Spence (IWOCA, 2023)

Lightweight Near-Additive Spanners. - Yuval Gitlitz; Ofer Neiman; Richard Spence (WG, 2024)