draw graph

http://www.icl.pku.edu.cn/member/yujs/bsdfiles/html/mpost.html
UNIX下绘图面面观

http://www.tug.org/metapost.html

http://www.python-course.eu/finite_state_machine.php

http://www.hahack.com/tools/pgftikz-resources/

http://www.bubuko.com/infodetail-2002658.html
http://www.ctan.org/pkg/vaucanson-g

http://www.newsmth.net/nForum/#!article/TeX/322457?p=2

http://blog.sina.com.cn/s/blog_6aee843a0100zygd.html

http://smallx.me/2016/04/10/%E4%BD%BF%E7%94%A8Graphviz%E7%BB%98%E5%88%B6%E6%B5%81%E7%A8%8B%E5%9B%BE%E5%92%8C%E5%85%B3%E7%B3%BB%E5%9B%BE/?utm_source=tuicool&utm_medium=referral

http://plantuml.com/state-diagram

http://www.jianshu.com/p/e92a52770832
http://plantuml.com/PlantUML_Language_Reference_Guide.pdf

http://blog.csdn.net/zouhust/article/details/50317949

https://www.overleaf.com/read/nqgpxpydxzxw#/5635956/

http://bbs.pinggu.org/thread-3964674-1-1.html

tikz  pgf

https://www.zhihu.com/question/27998366

http://www.cs.bell-labs.com/10thEdMan/pic.pdf

http://www.zhihujingxuan.com/18179.html

http://www.cnblogs.com/hbccdf/p/Script_drawing_tool_summary.html

http://www.graphviz.org/Documentation/dotguide.pdf