Optimal Pruning Quad-Tree Block-Based Binary Shape Coding. - Zhenliang Shen; Michael R. Frater; John F. Arnold (ICIP (6), 2007)

Quad-Tree Block-Based Binary Shape Coding. - Zhenliang Shen; Michael R. Frater; John F. Arnold (IEEE Trans. Circuits Syst. Video Technol., 2008)

Binary shape coding and lossless image compression. - Zhenliang Shen (2010)