A note on a Liouville-type result for a system of fourth-order equations in ${\mathbb{R}}^{N}$. Rute Domingos, Ana; Guo, Yuxia — 2002 Electronic Journal of Differential Equations (EJDE) [electronic only]

Existence and multiplicity results for nonlinear elliptic problems in ${\mathbb{R}}^{N}$ with an indefinite functional. Costa, David G.; Guo, Yuxia; Ramos, Miguel — 2002 Electronic Journal of Differential Equations (EJDE) [electronic only]