A Computer Graphics System for Block Diagram Problems.

Laszlo A. Belady Mike W. Blasgen Carlo J. Evangelisti Robert D. Tennison A Computer Graphics System for Block Diagram Problems. 143-161 1971 10 IBM Systems Journal 2 db/journals/ibmsj/ibmsj10.html#BeladyBET71 http://dx.doi.org/10.1147/sj.102.0143