1. Electron Spin Resonance in a Silicon Semiconductor
2. C.A.J. Ammerlaan, Landort–Börnstein new series, group III, vol. 41A2a, pp. 244–308.
3. EPR in Semiconductors, http://www.kc.tsukuba.ac.jp/div-media/epr/.
4. STDB (Spin Trap DataBase), http://epr.niehs.nih.gov/stdb.html.
5. C.A.J. Ammerlaan, Landort–Börnstein new series, group III, vol. 41A2, pp. 6–76.