TY  - JOUR
A1  - Helsper, Christoph
A1  - Mölter, W.
A1  - Willemer, W.
T1  - Fast and Automated Testing of Filter Media / Mölter, W. ; Helsper, C. ; Willemer, W.
JF  - FILTECH Conference 1987 : Utrecht, Holland; September 23 - 25 1987 / org. by the Filtration Society , Vol. 1.
Y1  - 1987
N1  - Filtech Conference ; (1987, Utrecht)
SP  - 106
EP  - 112
PB  - Filtration Society
CY  - Loughborough
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
T1  - Evaluation of Particle Size Distributions by Means of Particle Counters / Fißan, H. J. ; Helsper, C.
JF  - Proceedings of the First Workshop of Particulate Control : 16. - 17. March 1978, Kernforschung-sanlage Jülich GmbH / prepared by U.S. Environmental Protection Agency, Off. of Research and Development, Washington, D.C, 1979,
Y1  - 1979
N1  - Workshop of Particulate Control ; (1, 1978, Jülich); Berichte der Kernforschungsanlage Jülich Conferences ; 28
PB  - Zentralbibliothek d. Kernforschungsanlage Jülich [in Komm.]
CY  - Jülich
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
T1  - Numerical Simulation Studies and Data Reduction for Size Classifying Measurement Techniques / Fißan, H. J.; Helsper, C.
JF  - Aerosols in science, medicine and technology : conference / Gesellschaft für Aerosolforschung 7. 1979.
Y1  - 1979
SP  - 199
EP  - 205
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
T1  - Numerical Simulation Studies and Data Reduction for Size Classifying Measurement Techniques / Fißan, H. J.; Helsper, C.
JF  - Advances in Particle Sampling and Measurement: Proceedings, Daytona Beach, EPA 600/9 80 004, 1980
Y1  - 1980
N1  - Advances in Particle Sampling and Measurement ; (1979.10. : ; Daytona Beach/Fla.)
PB  - National Technical Information Service
CY  - Springfield, Va.
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
A1  - Muggli, J.
A1  - Scheidweiler, A.
T1  - Particle Number Distributions of Aerosols from Test Fires
JF  - Journal of Aerosol Science. 11 (1980), H. 5-6
Y1  - 1980
SN  - 0021-8502
SP  - 439
EP  - 446
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
T1  - Response Characteristic of a Polytec HC-15 Optical Particle Counter
JF  - Aerosols in science, medicine and technology : Physical and chemical properties of aerosols : Association for Aerosol Research: annual conference. 1980 : Gesellschaft für Aerosolforschung: annual conference. 1980 : Aerosols in science, medicine and technology : Physical and chemical properties of aerosols : Associa-tion for Aerosol Research: annual conference. 1980 : Gesellschaft für Aerosolforschung: annual conference. 1980 : Schmallenberg, 22.10.80 - 24.10.80
Y1  - 1981
N1  - Journal of aerosol science. Volume 0012 ; no 003
SP  - 287
EP  - 292
PB  - Pergamon Pr.
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Helsper, Christoph
A1  - Fißan, H. J.
A1  - Kapadi, A.
A1  - Liu, B. Y. H.
T1  - Data Inversion by Simplex Minimization for the Electrical Aerosol Analyzer
JF  - Aerosol Science and Technology. 1 (1982), H. 1982
Y1  - 1982
SN  - 0278-6826
SP  - 136
EP  - 146
ER  - 
TY  - JOUR
A1  - Mackenstein, Hans
T1  - The role of Germany, Japan and the United States on the ECU-bond markets / Hans Wilhelm Mackenstein
JF  - De pecunia. 3 (1991), H. 1
Y1  - 1991
SN  - 1015-6283
SP  - 113
EP  - 150
ER  - 
TY  - JOUR
A1  - Mackenstein, Hans
A1  - Jeffery, Charlie
T1  - Financial equalization in the 1990s : on the road back to Karlsruhe / Hans Mackenstein and Charlie Jeffery
JF  - Recasting German federalism : the legacies of unification
Y1  - 1999
SN  - 1-85567-579-x
SP  - 155
EP  - 176
PB  - Pinter
CY  - London
ER  - 
TY  - JOUR
A1  - Mackenstein, Hans
T1  - Books Reviewed - European Democratization since 1800 edited by J. Garrard, V. Tolz and R. White
JF  - Democratization. 7 (2000), H. 4
Y1  - 2000
SN  - 1351-0347
SP  - 219
EP  - 219
ER  -