The nonuniform FFT and its applications in tomographic image reconstruction. Fessler, J. A. & Sutton, B. P. 2002.
bibtex   
@CONFERENCE{fessler:02:tnf,
 author = {J. A. Fessler and B. P. Sutton},
 title = {The nonuniform {FFT} and its applications in tomographic image reconstruction},
 booktitle = {{LANL Workshop on Image Analysis}},
 year = 2002
}

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