@inproceedings{jin-yu2015spatial,
title={Spatial chaos of Wang tiles with two symbols},
author={Jin-Yu Chen, Yu-Jie Chen, Wen-Guei Hu, and Song-Sun Lin},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160914160430866050005},
booktitle={ Journal of Mathematical Physics},
volume={57},
pages={637-658},
year={2015},
}

Jin-Yu Chen, Yu-Jie Chen, Wen-Guei Hu, and Song-Sun Lin. Spatial chaos of Wang tiles with two symbols. 2015. Vol. 57. In Journal of Mathematical Physics. pp.637-658. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160914160430866050005.