@article{patterns,transitions,spp, author={ Zhao Cheng, and Zhiyong Chen, and Tamás Vicsek, and Duxin Chen, and HHai-Tao Zhang}, title={Pattern phase transitions of self-propelled particles: gases, crystals, liquids, and mills}, journal={New Journal of Physics}, volume={18}, number={}, pages={103005}, url={https://www.dovepress.com/articles.php?article_id=27635}, year={2016}, }