@article{MOMA_1996__121_3_178716,
     author = {Karl Prachar and Hans Sagan},
     title = {On the {Differentiability} of the {Coordinate} {Functions} of {P\'oyla's} {Space-Filling} {Curve.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {125--138},
     publisher = {mathdoc},
     volume = {121},
     number = {3},
     year = {1996},
     zbl = {0845.53003},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1996__121_3_178716/}
}