no. 3
Remarks on the uniqueness of radial solutions
ESAIM: Modélisation mathématique et analyse numérique, Attractors, Inertial Manifolds and their Approximation. Proceedings of the Marseille-Luminy... 1987, Tome 23 (1989) no. 3, pp. 535-540 
@article{M2AN_1989__23_3_535_0,
     author = {Smoller, J. and Wasserman, A.},
     title = {Remarks on the uniqueness of radial solutions},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {535--540},
     year = {1989},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {23},
     number = {3},
     mrnumber = {1014490},
     zbl = {0697.35046},
     language = {en},
     url = {https://www.numdam.org/item/M2AN_1989__23_3_535_0/}
}
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Smoller, J.; Wasserman, A. Remarks on the uniqueness of radial solutions. ESAIM: Modélisation mathématique et analyse numérique, Attractors, Inertial Manifolds and their Approximation. Proceedings of the Marseille-Luminy... 1987, Tome 23 (1989) no. 3, pp. 535-540. https://www.numdam.org/item/M2AN_1989__23_3_535_0/

[1] P. Clement and G. Sweers, Existence and multiplicity results for a semilinear eigenvalue problem (preprint).

[2] J. Smoller and A. Wasserman, Existence, uniqueness, and nondegeneracy of positive solutions of semilineare elliptic equations, Comm. Math. Phys., 95 (1984), 129-159. | Zbl | MR

[3] J. Smoller and A. Wasserman, Symmetry, degeneracy, and universahty in semilinear elliptic equations, I. Infinitesimal symmetry breaking (to appear in J. Funct. Anal.). | Zbl | MR

[4] J. Smoller and A. Wasserman, On the monotonicity of the time map J. Diff. Eqns. | Zbl