@article{ITA_1993__27_2_135_0,
     author = {Bertoni, A. and Goldwurm, M.},
     title = {On ranking 1-way finitely ambiguous {NL} languages and $\# P_1$-complete census functions},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {135--148},
     publisher = {EDP-Sciences},
     volume = {27},
     number = {2},
     year = {1993},
     mrnumber = {1217682},
     zbl = {0780.68082},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1993__27_2_135_0/}
}