@article{MET_1989__36_3-4_176213,
     author = {N. Gaffke and R. Mathar},
     title = {A {Cyclic} {Projection} {Algorithm} {Via} {Duality.}},
     journal = {Metrika},
     pages = {29--54},
     publisher = {mathdoc},
     volume = {36},
     number = {3-4},
     year = {1989},
     zbl = {0676.90054},
     url = {http://geodesic.mathdoc.fr/item/MET_1989__36_3-4_176213/}
}