@article{ITA_2005__39_1_93_0,
     author = {de Carvalho, Marcelo H. and Lucchesi, Cl\'audio L. and Murty, U. S. R.},
     title = {On the number of dissimilar pfaffian orientations of graphs},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {93--113},
     publisher = {EDP-Sciences},
     volume = {39},
     number = {1},
     year = {2005},
     doi = {10.1051/ita:2005005},
     mrnumber = {2132580},
     zbl = {1069.05066},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ita:2005005/}
}