@article{10_21136_CMJ_1982_101845,
     author = {Laugwitz, Detlef},
     title = {Bolzano's infinitesimal numbers},
     journal = {Czechoslovak Mathematical Journal},
     pages = {667--670},
     publisher = {mathdoc},
     volume = {32},
     number = {4},
     year = {1982},
     doi = {10.21136/CMJ.1982.101845},
     mrnumber = {682143},
     zbl = {0512.01003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1982.101845/}
}