Decanniere, P., Joppart, T., Debuyst, R., Dejehet, F., & Apers, D. (1985). Electron-spin-resonance Dating - a Study of Humic Acids Incorporated in Synthetic Calcite. Nuclear Tracks and Radiation Measurements, 10(4-6), 853-863. https://hdl.handle.net/2078.5/44593 (Original work published 1985)