@article{GDZPPN002477777,
title = {A Geometric Theory of Surface Area.},
journal = {Monatshefte f\"ur Mathematik},
volume = {76},
year = {1972},
pages = {66-77},
zbl = {0239.50002},
url = {http://dml.mathdoc.fr/item/GDZPPN002477777}
}
Toralballa, L.V. A Geometric Theory of Surface Area.. Monatshefte für Mathematik, Tome 76 (1972) pp. 66-77. http://gdmltest.u-ga.fr/item/GDZPPN002477777/