A. Benninghoven,Ion formation from organic solids (IFOS IV).Ion formation from organic solids (IFOS IV)：mass spectrometry of involatile material : proceedings of the fourth international conference, Munster, Federal Republic of Germany, Sept. 21-23, 1987.Wiley,1989.
Ion formation from organic solids (IFOS IV)：mass spectrometry of involatile material : proceedings of the fourth international conference, Munster, Federal Republic of Germany, Sept. 21-23, 1987
A. Benninghoven,Ion formation from organic solids (IFOS IV).Wiley,1989.
