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6742.html
6742.html
https://web.archive.org/web/20080315225354/http:/www.worldscibooks.com/physics/6742.html
Hagen Kleinert
Kosterlitz–Thouless transition
Multivalued function
Link from a Wikipage to an external page
6742.html
https://web.archive.org/web/20080315225354/http:/www.worldscibooks.com/physics/6742.html