Edward Bertram, P. Erds, Peter Horák, Jozef Sirán, Zsolt Tuza. Local and global average degree in graphs and multigraphs. Journal of Graph Theory, 18(7):647-661, 1994. [doi]
@article{BertramEHST94,
title = {Local and global average degree in graphs and multigraphs},
author = {Edward Bertram and P. Erds and Peter Horák and Jozef Sirán and Zsolt Tuza},
year = {1994},
doi = {10.1002/jgt.3190180702},
url = {http://dx.doi.org/10.1002/jgt.3190180702},
researchr = {https://researchr.org/publication/BertramEHST94},
cites = {0},
citedby = {0},
journal = {Journal of Graph Theory},
volume = {18},
number = {7},
pages = {647-661},
}