@article{1103051513,
author = {Martin, M. H.},
title = {The Monge-Amp\`ere partial differential equation $rt-s^2+\lambda^2=0$.},
journal = {Pacific J. Math.},
volume = {3},
number = {4},
year = {1953},
pages = { 165-187},
language = {en},
url = {http://dml.mathdoc.fr/item/1103051513}
}
Martin, M. H. The Monge-Ampère partial differential equation $rt-s^2+\lambda^2=0$.. Pacific J. Math., Tome 3 (1953) no. 4, pp. 165-187. http://gdmltest.u-ga.fr/item/1103051513/