relation: https://pure.iiasa.ac.at/id/eprint/5965/ title: An abstract extremal principle with applications to welfare economics creator: Mordukhovich, B.S. publisher: Elsevier date: 2000 type: Article type: PeerReviewed identifier: Mordukhovich, B.S. (2000). An abstract extremal principle with applications to welfare economics. Journal of Mathematical Analysis and Applications 187-216.