@article{MZ_1936__41_168699,
     author = {O. Targa},
     title = {Integralgeometrie 19. {Mittelwerte} an dem {Durchschnitt} bewegter {Fl\"achen}},
     journal = {Mathematische Zeitschrift},
     pages = {768--784},
     publisher = {mathdoc},
     volume = {41},
     year = {1936},
     zbl = {0015.12101},
     url = {http://geodesic.mathdoc.fr/item/MZ_1936__41_168699/}
}