Fixed point theory for weakly sequentially upper semicontinuous maps with applications to differential inclusions

by Agarwal, R.P., O'Regan, D.
Published 2002

Existence of positive solutions for the singular equation (φp(y'))' + g(t, y, y') = 0

by Haishen, Lu, O'Regan, D., Chengkui Zhong
Published 2003

Optimal existence theory for single and multiple positive periodic solutions to functional differential equations

by Jiang, D., O'Regan, D., Agarwal, R.P.
Published 2003

Oscillation of certain fourth order functional differential equations

by Agarwal, R.P., Grace, S.R., O’Regan, D.
Published 2007

Eigenvalue characterization of a system of difference equations

by Agarwal, R.P., O'Regan, D., P. J. Y. Wong
Published 2004