@article{MZ_1936__40_168614,
     author = {O. Varga},
     title = {Integralgeometrie 3. {Croftons} {Formeln} f\"ur den {Raum}},
     journal = {Mathematische Zeitschrift},
     pages = {387--405},
     publisher = {mathdoc},
     volume = {40},
     year = {1936},
     zbl = {0012.11803},
     url = {http://geodesic.mathdoc.fr/item/MZ_1936__40_168614/}
}