@article{1077475518,
author = {Santal\'o, L. A.},
title = {Integral geometry on surfaces},
journal = {Duke Math. J.},
volume = {16},
number = {1},
year = {1949},
pages = { 361-375},
language = {en},
url = {http://dml.mathdoc.fr/item/1077475518}
}
Santaló, L. A. Integral geometry on surfaces. Duke Math. J., Tome 16 (1949) no. 1, pp. 361-375. http://gdmltest.u-ga.fr/item/1077475518/