Approximation Algorithms for the Single Allocation Problem in Hub-and-Spoke Networks. - Masaru Iwasa; Hiroo Saito; Tomomi Matsui (Electron. Notes Discret. Math., 2006)

Approximation algorithms for the single allocation problem in hub-and-spoke networks and related metric labeling problems. - Masaru Iwasa; Hiroo Saito; Tomomi Matsui (Discret. Appl. Math., 2009)