1. Symmetric positive entire solutions to nonlinear biharmonic equations;Furusho;Differential Equations,1995
2. Y. Furusho, T. Kusano, A supersolution-subsolution method for nonlinear biharmonic equations, Czechoslovak Math. J., to appear.
3. On the elliptic equation Δu=π(x)uθ in R2;Kawano,1985
4. Radial entire solutions to even order semilinear elliptic equations in the plane;Kusano,1987