@article{1077472369,
author = {Young, L. C.},
title = {An expression connected with the area of a surface $z=F(x,y)$},
journal = {Duke Math. J.},
volume = {11},
number = {1},
year = {1944},
pages = { 43-57},
language = {en},
url = {http://dml.mathdoc.fr/item/1077472369}
}
Young, L. C. An expression connected with the area of a surface $z=F(x,y)$. Duke Math. J., Tome 11 (1944) no. 1, pp. 43-57. http://gdmltest.u-ga.fr/item/1077472369/