Henriksen, J., O. Jensen, M. Jørgensen, N. Klarlund, R. Paige, T. Rauhe, and A. Sandholm. “MONA: Monadic Second-Order Logic in Practice”. BRICS Report Series, Vol. 2, no. 21, Jan. 1995, doi:10.7146/brics.v2i21.19923.