Media type: E-Article Title: Extremal Functions with Vanishing Condition Contributor: Littmann, Friedrich; Spanier, Mark imprint: Springer Science and Business Media LLC, 2015 Published in: Constructive Approximation Language: English DOI: 10.1007/s00365-015-9304-4 ISSN: 0176-4276; 1432-0940 Keywords: Computational Mathematics ; General Mathematics ; Analysis Origination: Footnote: