documentation:
          expt. doc.
          handwaving introduction to ESR

    Links:

• ESR and EPR resources at NIEHS
• Overview of ESR (Interscientia, Univ. Ottawa)
• Hand waving guide to Electron Spin Resonance (ESR) (Univ. of St. Andrews)
• Terahertz technology group (Univ. of St. Andrews)
• Electron Paramagnetic Resonance (EPR, ESR, EMR, ENDOR) Information (FU Berlin)
• EPR Research Group ETH Zurich