Friedrich W. von Henke, G. Rose, Klaus Indermark, Klaus Weihrauch. On primitive recursive wordfunctions. Computing, 15(3):217-234, 1975. [doi]
@article{HenkeRIW75,
title = {On primitive recursive wordfunctions},
author = {Friedrich W. von Henke and G. Rose and Klaus Indermark and Klaus Weihrauch},
year = {1975},
doi = {10.1007/BF02242369},
url = {http://dx.doi.org/10.1007/BF02242369},
researchr = {https://researchr.org/publication/HenkeRIW75},
cites = {0},
citedby = {0},
journal = {Computing},
volume = {15},
number = {3},
pages = {217-234},
}