On Approximation of Bookmark Assignments. - Yuichi Asahiro; Eiji Miyano; Toshihide Murata; Hirotaka Ono 001 (MFCS, 2007)

Optimal approximability of bookmark assignments. - Yuichi Asahiro; Eiji Miyano; Toshihide Murata; Hirotaka Ono 001 (Discret. Appl. Math., 2013)