Meykens, A., Coussement, R., Ladrière, J., Cogneau, M., Boge, M., Auric, P., Bouchez, R., Benabed, A., & Godard, J. (1980). Isomer-shift Calibration of Fe-57 By Lifetime Variations in the Electron-capture Decay of Fe-52. Physical Review. B, Condensed Matter, 21(9), 3816-3825. https://doi.org/10.1103/PhysRevB.21.3816 (Original work published 1980)