On the Approximability of Minimum Topic Connected Overlay and Its Special Instances. - Jun Hosoda; Juraj Hromkovic; Taisuke Izumi; Hirotaka Ono 001; Monika Steinová; Koichi Wada 001 (MFCS, 2011)

On the approximability and hardness of minimum topic connected overlay and its special instances. - Jun Hosoda; Juraj Hromkovic; Taisuke Izumi; Hirotaka Ono 001; Monika Steinová; Koichi Wada 001 (Theor. Comput. Sci., 2012)

Corrigendum to "On the approximability and hardness of minimum topic connected overlay and its special instances" [Theoret. Comput. Sci. 429(2012) 144-154]. - Jun Hosoda; Juraj Hromkovic; Taisuke Izumi; Hirotaka Ono 001; Monika Steinová; Koichi Wada 001 (Theor. Comput. Sci., 2015)