@article{02186870,
title = {The greatest common divisor of two recursive functions.},
journal = {Journal of Integer Sequences [electronic only]},
volume = {7},
year = {2004},
zbl = {1069.11002},
language = {en},
url = {http://dml.mathdoc.fr/item/02186870}
}
Schlage-Puchta, Jan-Christoph; Spilker, Jürgen. The greatest common divisor of two recursive functions.. Journal of Integer Sequences [electronic only], Tome 7 (2004) . http://gdmltest.u-ga.fr/item/02186870/