@article{1077377004,
author = {Avila, G. S. S. and Gilbert, R. P.},
title = {On the analytic properties of solutions of equation $\Delta u+xu\_{x}+yu\_{y}+c(r)u=0$},
journal = {Duke Math. J.},
volume = {34},
number = {1},
year = {1967},
pages = { 353-362},
language = {en},
url = {http://dml.mathdoc.fr/item/1077377004}
}
Avila, G. S. S.; Gilbert, R. P. On the analytic properties of solutions of equation $\Delta u+xu_{x}+yu_{y}+c(r)u=0$. Duke Math. J., Tome 34 (1967) no. 1, pp. 353-362. http://gdmltest.u-ga.fr/item/1077377004/