relation: http://acta.bibl.u-szeged.hu/42193/ title: Positive solutions for singular m-point boundary value problems with sign changing nonlinearities depending on x creator: Ma Ya creator: Yang Baoqiang date: 2009 type: Folyóirat type: NonPeerReviewed format: part language: hu identifier: http://acta.bibl.u-szeged.hu/42193/1/ejqtde_2009_043_001-014.pdf identifier: Ma Ya; Yang Baoqiang: Positive solutions for singular m-point boundary value problems with sign changing nonlinearities depending on x. (2009)