Yung-Kuan Chan Her-Fa Wang Chin-Fan Lee A Refined VQ-Based Image Compression Method. 213-221 2004 61 Fundam. Informaticae 3-4 http://content.iospress.com/articles/fundamenta-informaticae/fi61-3-4-02 db/journals/fuin/fuin61.html#ChanWL04