eng Aron, J Benaroya, R Bollinger, L M Clifft, B E Despe, O Jaffey, A H Johnson, K W Khoe, T K Livingood, J J Markovich, P Nixon, J M Parker, G W Wesolowski Development of the superconducting Helix for Heavy-ion acceleration XX 1974 http://cds.cern.ch/record/869915 http://cds.cern.ch/record/869915