A hybrid BEQQ mass spectrometer Schoen, A. E. ; Amy, J. W. ; Ciupek, J. D. ; Cooks, R. G. ; Dobberstein, P. ; Jung, G. Abstract Publication: International Journal of Mass Spectrometry and Ion Processes Pub Date: May 1985 DOI: 10.1016/0168-1176(85)85059-X Bibcode: 1985IJMSI..65..125S