1. Numerical Inversion of the Laplace Transform;Bellman,1966
2. Singular value decomposition of a complex matrix;Businger;Comm. Assoc. Comput. Mach.,1969
3. The variable-slit impactor and aerosol size distribution analysis;Cooper,1974
4. Cascade impactors for aerosols: improved data analysis;Cooper;Am. Ind. Hyg. Assoc. J.,1972
5. A new particle size classifier: variable-slit impactor with photo-counting;Cooper;Atmospheric Environment,1974