Media type: E-Article Title: Approximability and inapproximability of the minimum certificate dispersal problem Contributor: Izumi, Tomoko; Izumi, Taisuke; Ono, Hirotaka; Wada, Koichi imprint: Elsevier BV, 2010 Published in: Theoretical Computer Science Language: English DOI: 10.1016/j.tcs.2010.03.029 ISSN: 0304-3975 Keywords: General Computer Science ; Theoretical Computer Science Origination: Footnote: Access State: Open Access