Three positive radial solutions for elliptic equations in a ball. - João Marcos do Ó; Sebastián Lorca; Pedro Ubilla (Appl. Math. Lett., 2005)

Multiplicity of solutions for a class of non-homogeneous fourth-order boundary value problems. - João Marcos do Ó; Sebastián Lorca; Pedro Ubilla (Appl. Math. Lett., 2008)

Boundary blow-up solutions for the Monge-Ampère equation with an invariant gradient type term. - José Francisco de Oliveira; João Marcos do Ó; Pedro Ubilla (Appl. Math. Lett., 2024)