Media type: E-Article Title: On the Classification Problem for Rank 2 Torsion-Free Abelian Groups Contributor: Kechris, Alexander S. imprint: Wiley, 2000 Published in: Journal of the London Mathematical Society Language: English DOI: 10.1112/s0024610700001411 ISSN: 0024-6107 Keywords: General Mathematics Origination: Footnote: