Fred R. McMorris, Henry Martyn Mulder, Oscar Ortega. Axiomatic Characterization of the mean Function on Trees. Discrete Math., Alg. and Appl., 2(3):313-330, 2010. [doi]
@article{McMorrisMO10,
title = {Axiomatic Characterization of the mean Function on Trees},
author = {Fred R. McMorris and Henry Martyn Mulder and Oscar Ortega},
year = {2010},
doi = {10.1142/S1793830910000681},
url = {http://dx.doi.org/10.1142/S1793830910000681},
researchr = {https://researchr.org/publication/McMorrisMO10},
cites = {0},
citedby = {0},
journal = {Discrete Math., Alg. and Appl.},
volume = {2},
number = {3},
pages = {313-330},
}