Primary research paper; classical planar Townsend criterion, empirical ionization coefficient and limits of its geometric assumptions. Full byline verified on the primary publisher page.
Publisher: agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JD038427 . The published five-author byline above differs from the earlier arXiv version, which also lists Jacob A. Engle; author contributions are reported in the published article.