@article{NUMA_1979__32_132621,
     author = {F. Natterer},
     title = {On the {Inversion} of the {Attenuated} {Radon} {Transform.}},
     journal = {Numerische Mathematik},
     pages = {431--438},
     publisher = {mathdoc},
     volume = {32},
     year = {1979},
     zbl = {0427.65082},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1979__32_132621/}
}