@article{IUPAC+E01999+2025,
url = {https://doi.org/10.1351/goldbook.E01999},
institution = {International Union of Pure and Applied Chemistry (IUPAC)},
year = {2025},
title = {electron ionization},
doi = {doi:10.1351/goldbook.E01999},
edition = {5.0.0}
}