Ingo Althöfer. Average distances in undirected graphs and the removal of vertices. Journal of Combinatorial Theory, Series A, 48(1):140-142, 1990. [doi]
@article{Althofer90-0,
title = {Average distances in undirected graphs and the removal of vertices},
author = {Ingo Althöfer},
year = {1990},
doi = {10.1016/0095-8956(90)90136-N},
url = {http://dx.doi.org/10.1016/0095-8956(90)90136-N},
tags = {graph-rewriting, rewriting},
researchr = {https://researchr.org/publication/Althofer90-0},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {48},
number = {1},
pages = {140-142},
}