@article{GDZPPN002440237,
title = {An ODE approach to the equation ... U + Ku ... = 0, in Rn.},
journal = {Mathematische Zeitschrift},
volume = {209},
year = {1992},
pages = {137-166},
zbl = {0759.35019},
url = {http://dml.mathdoc.fr/item/GDZPPN002440237}
}
Bianchi, Gabriele; Egnell, Henrik. An ODE approach to the equation ... U + Ku ... = 0, in Rn.. Mathematische Zeitschrift, Tome 209 (1992) pp. 137-166. http://gdmltest.u-ga.fr/item/GDZPPN002440237/