Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1976_226_4_a12, author = {V. M. Fedorov}, title = {Haken{\textquoteright}s algorithm is primitive recursive}, journal = {Doklady Akademii Nauk}, pages = {787--788}, publisher = {mathdoc}, volume = {226}, number = {4}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1976_226_4_a12/} }
V. M. Fedorov. Haken’s algorithm is primitive recursive. Doklady Akademii Nauk, Tome 226 (1976) no. 4, pp. 787-788. http://geodesic.mathdoc.fr/item/DAN_1976_226_4_a12/