Dragan, F., Yan, C., & Lomonosov, I. (2006). Collective Tree Spanners of Graphs. SIAM Journal on Discrete Mathematics. https://oaks.kent.edu/node/1329
Dragan, Feodor, Chenyu Yan, and Irina Lomonosov. 2006. “Collective Tree Spanners of Graphs”. SIAM Journal on Discrete Mathematics. https://oaks.kent.edu/node/1329.
Dragan, F., C. Yan, and I. Lomonosov. Collective Tree Spanners of Graphs. SIAM Journal on Discrete Mathematics, 1 Jan. 2006, https://oaks.kent.edu/node/1329.