@article{MZ_1971__119_171468,
     author = {William R. Derrick},
     title = {Inequalities for {p-Modules} of {Curve} {Families} on {Lipschitz} {Surfaces.}},
     journal = {Mathematische Zeitschrift},
     pages = {1--10},
     publisher = {mathdoc},
     volume = {119},
     year = {1971},
     zbl = {0193.01002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1971__119_171468/}
}