Devillers, M., Ladrière, J., & Apers, D. (1986). Emission Mossbauer Study of Recoil-induced Frenkel Pairs in Nickel Created By Neutrino and Gamma-ray Emission in the Electron-capture Decay of Ni-57. Hyperfine Interactions, 30(3), 205-219. https://doi.org/10.1007/BF02396916 (Original work published 1986)