@article{MOMA_1970__74_177526,
     author = {L.V. Toralballa},
     title = {A {Geometric} {Theory} of {Surface} {Area.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {462--476},
     publisher = {mathdoc},
     volume = {74},
     year = {1970},
     zbl = {0224.50002},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1970__74_177526/}
}