@inproceedings{ckppt-dpsht-16
, author = "Colin~de Verdi\`{e}re, {\'E}ric and
Kalu\v{z}a, Vojt\v{e}ch and Pat{\'a}k, Pavel and
Pat{\'a}kov{\'a}, Zuzana and Tancer, Martin"
, title = "A direct proof of the strong {H}anani--{T}utte
theorem on the projective plane"
, booktitle = "Proceedings of the 25th International Symposium on
Graph Drawing and Network Visualization (GD)"
, year = "2016"
, pages = "454--467"
}