@article{ITA_1986__20_2_183_0,
     author = {Walter, Hermann K.-G.},
     title = {A simple proof of {Valiant's} lemma},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {183--190},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {20},
     number = {2},
     year = {1986},
     mrnumber = {860768},
     zbl = {0606.68075},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1986__20_2_183_0/}
}