@inbook{Whyburn+2015+56+71,
url = {https://doi.org/10.1515/9781400879335-008},
title = {Chapter V. Topological Index},
booktitle = {Topological Analysis},
author = {Gordon Thomas Whyburn},
publisher = {Princeton University Press},
address = {Princeton},
pages = {56--71},
doi = {doi:10.1515/9781400879335-008},
isbn = {9781400879335},
year = {2015},
lastchecked = {2026-05-11}
}