[2] Yuan-Hann Chang, et al., Nucl. Instr. and Meth. A 339 524-530 (1994).
[3] "The GEM Muon System Based on Cathode Strip Chambers", GEM Muon Group, GEM TN-92- 199
[4] Martin Cooper, private communication.
[5] "GEM Technical Design Report, The GEM Central Tracker", the GEM Central Tracker Group, GEM TN-92-63