1. M. Achilles, J. Bendisch, K. Cassirer, and H. von Trotha, A heuristic matching algorithm and its application to 2D Ising spin glasses, GMD-Studies, Gesellschaft für Mathematik und Datenverarbeitung, D-5205 St. Augustin (1991).
2. F. Barahona, R. Maynard, R. Rammal, and J. P. Uhry, Morphology on ground states of two-dimensional frustration model,J. Phys.: Math. Gen. 15:673?699 (1982).
3. J. Bendisch, On an optimization problem related to ground states in 2D Ising spin glasses, GMD-Studies (1991).
4. I. Bieche, R. Maynard, R. Rammal, and J. P. Uhry, On the ground states of the frustration model of a spin glass by a matching method of graph theory,J. Phys. A: Math. Gen. 13:2553?2576 (1980).
5. H. Freund and P. Grassberger, The ground state of the ±J spin glass from a heuristic matching algorithm,J. Phys. A: Math. Gen. 22:4045?4059 (1989).