Koji Nuida Manabu Hagiwara Hajime Watanabe Hideki Imai Optimization of Tardos's Fingerprinting Codes in a Viewpoint of Memory Amount. 279-293 2007 conf/ih/2007 Information Hiding http://dx.doi.org/10.1007/978-3-540-77370-2_19 db/conf/ih/ih2007.html#NuidaHWI07