Jin-Hui Fang. A characterization of the identity function with equation f(p+q+r)=f(p)+f(q)+f(r). Combinatorica, 31(6):697-701, 2011. [doi]
@article{Fang11-6,
title = {A characterization of the identity function with equation f(p+q+r)=f(p)+f(q)+f(r)},
author = {Jin-Hui Fang},
year = {2011},
doi = {10.1007/s00493-011-2739-8},
url = {http://dx.doi.org/10.1007/s00493-011-2739-8},
researchr = {https://researchr.org/publication/Fang11-6},
cites = {0},
citedby = {0},
journal = {Combinatorica},
volume = {31},
number = {6},
pages = {697-701},
}