Media type: E-Article Title: North-Holland Mathematics Studies: Preface Contributor: Eckhaus, Wiktor; van Harten, Aart imprint: Elsevier, 1981 Published in: North-Holland Mathematics Studies Language: Not determined DOI: 10.1016/s0304-0208(08)70590-5 ISSN: 0304-0208 Origination: Footnote: