@article{MAN_1966__167_161470,
     author = {P. AXT},
     title = {Iteration of {Relative} {Primitive} {Recursion}},
     journal = {Mathematische Annalen},
     pages = {53--55},
     publisher = {mathdoc},
     volume = {167},
     year = {1966},
     zbl = {0192.05002},
     url = {http://geodesic.mathdoc.fr/item/MAN_1966__167_161470/}
}