@article{PORMA_1983__42_3_115543,
     author = {Marchi, Ezio},
     title = {A von {Neumann} model with an arbitrary number of steps},
     journal = {Portugaliae mathematica},
     pages = {277--286},
     publisher = {mathdoc},
     volume = {42},
     number = {3},
     year = {1983},
     mrnumber = {0819907},
     zbl = {0581.90018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1983__42_3_115543/}
}