@article{DMTCS_2009_special_256_a48,
     author = {Aval, Jean-Christophe and Duchon, Philippe},
     title = {Enumeration of alternating sign matrices of even size (quasi)-invariant under a quarter-turn rotation},
     journal = {Discrete mathematics & theoretical computer science},
     publisher = {mathdoc},
     volume = {DMTCS Proceedings vol. AK, 21st International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2009)},
     year = {2009},
     doi = {10.46298/dmtcs.2726},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.2726/}
}