@article{GDZPPN00247722X,
title = {A Geometric Theory of Surface Area.},
journal = {Monatshefte f\"ur Mathematik},
volume = {74},
year = {1970},
pages = {462-476},
zbl = {0224.50002},
url = {http://dml.mathdoc.fr/item/GDZPPN00247722X}
}
Toralballa, L.V. A Geometric Theory of Surface Area.. Monatshefte für Mathematik, Tome 74 (1970) pp. 462-476. http://gdmltest.u-ga.fr/item/GDZPPN00247722X/