Guest, Martin A Harmonic maps, loop groups, and integrable systems Martin A. Guest - Cambridge New York Cambridge University Press 1997 - xiii, 194 p 24 cm - London Mathematical Society student texts 38 . Contine bibliografie si index ISBN: 0521580854 0521589320 (pbk.) LCCN: 96038837 Subjects--Topical Terms: Harmonic mapsLoops (Group theory)Differential equations Dewey Class. No.: 514/.74