@article{MS2_1964__15_165887,
     author = {R.L. Goodstein},
     title = {Diophantine {Equations} in {Recursive} {Difference.}},
     journal = {Mathematica Scandinavica},
     pages = {43--48},
     publisher = {mathdoc},
     volume = {15},
     year = {1964},
     zbl = {0149.28804},
     url = {http://geodesic.mathdoc.fr/item/MS2_1964__15_165887/}
}