Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{KYB_1982__18_2_a1, author = {\v{S}ebel{\'\i}k, Jan}, title = {Horn clause programs and recursive functions defined by systems of equations}, journal = {Kybernetika}, pages = {106--120}, publisher = {mathdoc}, volume = {18}, number = {2}, year = {1982}, mrnumber = {679783}, zbl = {0489.03013}, language = {en}, url = {http://geodesic.mathdoc.fr/item/KYB_1982__18_2_a1/} }
Šebelík, Jan. Horn clause programs and recursive functions defined by systems of equations. Kybernetika, Tome 18 (1982) no. 2, pp. 106-120. http://geodesic.mathdoc.fr/item/KYB_1982__18_2_a1/