1. CHORUS Collaboration, M. de Jong et al., A new search for νμ — ντ oscillation, CERN-PPE/93131.
2. NOMAD Collaboration, P. Astier et al., CERN-SPSLC / 91-21 (1991), CERN SPSLC/9148, SPSLC/P261 Add.1.
3. contributions reported at the ITEP Workshop on ντ Detection;Strolin,1989
4. A transverse solenoid for ντ detection;Strolin,1989