@article{article098c4d61,
title   = {Genus zero global surfaces of section for Reeb flows and a result of Birkhoff},
author = {Hryniewicz, Umberto L. and Salomão, Pedro Antônio Santoro and Wysocki, Krzysztof},
year = {2022},
doi = {10.4171/JEMS/1220},
journal   = {Journal of the European Mathematical Society}
}