Physics Options at the ILC. GG6 Summary at Snowmass2005
  At Snowmass2005 the Global Group 6 (Physics Options) considered the requirements and configurational issues related to possiblealternatives to the baseline e+e- collisions, including gamma-gamma, gamma-electron, electron-electron, GigaZ and fixed target experiments, and identified the potential performance parameters. 
V.I. Telnov (Institute of Nuclear Physics, Novosibirsk, Russia)