@misc{ToenniesSchmidWeickhardtetal., author = {T{\"o}nnies, Karen and Schmid, Reiner P. and Weickhardt, Christian and Reif, J{\"u}rgen and Grotemeyer, J.}, title = {Multiphoton ionization of nitrotoluenes by means of ultrashort laser pulses}, series = {International Journal of Mass Spectrometry}, volume = {206}, journal = {International Journal of Mass Spectrometry}, number = {3}, issn = {1387-3806}, pages = {245 -- 250}, language = {en} } @phdthesis{Toennies, author = {T{\"o}nnies, Karen}, title = {Einsatz der Lasermassenspektrometrie zum quantitativen Nachweis von Nitrotoluolen und ihren Abbauprodukten sowie von Polyzyklischen Aromatischen Kohlenwasserstoffen in Boden- und Wasserproben}, publisher = {Tenea}, address = {Berlin}, isbn = {3-936582-06-8}, language = {de} } @article{WeickhardtToenniesGlobig, author = {Weickhardt, Christian and T{\"o}nnies, Karen and Globig, Daniel}, title = {Detection and Quantification of Aromatic Contaminants in Water and Soil Samples by Means of Laser Desorption Laser Mass Spectrometry}, language = {en} } @article{WeickhardtToennies, author = {Weickhardt, Christian and T{\"o}nnies, Karen}, title = {Short Pulse Laser Mass Spectrometry of Nitrotoluenes: Ionization and Fragmentation Behavior}, language = {en} }