Take a look at this paper: http://web.cs.du.edu/~sturtevant/papers/incnew.pdf http://web.cs.du.edu/~sturtevant/papers/incnew.pdf Specifically, look at the Mar

Take a look at this paper: http://web.cs.du.edu/~sturtevant/papers/incnew.pdf http://web.cs.du.edu/~sturtevant/papers/incnew.pdf Specifically, look at the Martelli G family example.