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@article{MZ_1992__210_1_174393, author = {Gabriele Bianchi and Henrik Egnell}, title = {An {ODE} approach to the equation ... {U} + {Ku} ... = 0, in {Rn.}}, journal = {Mathematische Zeitschrift}, pages = {137--166}, publisher = {mathdoc}, volume = {210}, number = {1}, year = {1992}, zbl = {0759.35019}, url = {http://geodesic.mathdoc.fr/item/MZ_1992__210_1_174393/} }
Gabriele Bianchi; Henrik Egnell. An ODE approach to the equation ... U + Ku ... = 0, in Rn.. Mathematische Zeitschrift, Tome 210 (1992) no. 1, pp. 137-166. http://geodesic.mathdoc.fr/item/MZ_1992__210_1_174393/