On Hardy-Rellich type inequalities in RN. - David G. Costa (Appl. Math. Lett., 2009)

On positive solutions of one-dimensional semipositone equations with nonlinear boundary conditions. - Abdou K. Drame; David G. Costa (Appl. Math. Lett., 2012)

Existence result for a class of biharmonic equations with critical growth and singular potential in RN. - Guoqing Zhang; David G. Costa (Appl. Math. Lett., 2014)

A note on breaking of symmetry for a class of variational problems. - David G. Costa; Zhiwei Fang (Appl. Math. Lett., 2019)