@article{JRAM_1883__94_148528,
     author = {Thomas Craig},
     title = {Note on {Parallel} {Surfaces.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {162--170},
     publisher = {mathdoc},
     volume = {94},
     year = {1883},
     zbl = {15.0733.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1883__94_148528/}
}