Dana Angluin James Aspnes Jiang Chen Yinghua Wu Learning a circuit by injecting values. 60-77 2009 75 J. Comput. Syst. Sci. 1 http://dx.doi.org/10.1016/j.jcss.2008.07.004 db/journals/jcss/jcss75.html#AngluinACW09