1. T. Chow, TheQ
2. Perfect matchings of cellular graphs;Ciucu;J. Algebraic Combin.,1996
3. M. Ciucu, Enumeration of perfect matchings in graphs with reflective symmetry, J. Combin. Theory Ser. A
4. M. Ciucu, Perfect Matchings, Spanning Trees, Plane Partitions and Statistical Physics, Department of Mathematics, University of Michigan, Ann Arbor, MI, 1996
5. Alternating-sign matrices and domino tilings, I and II;Elkies;J. Algebraic Combin.,1992