PT Journal AU Wolf, R Slowik, JG Schaupp, C Amato, P Saathoff, H Möhler, O Prevot, ASH Baltensperger, U TI Characterization of ice-nucleating bacteria using on-line electron impact ionization aerosol mass spectrometry SO Journal of mass spectrometry PY 2015 BP 662 EP 671 VL 50 DI 10.1002/jms.3573 LA english ER