BibTex format
@article{Horcher:2020:10.1007/s11116-020-10138-4,
author = {Horcher, D and Graham, D},
doi = {10.1007/s11116-020-10138-4},
journal = {Transportation},
pages = {2521--2544},
title = {The Gini index of demand imbalances in public transport},
url = {http://dx.doi.org/10.1007/s11116-020-10138-4},
volume = {48},
year = {2020}
}