TY - BOOK AU - Hélein, Frédéric TI - Harmonic maps, conservation laws, and moving frames SN - 9780521811606 SN - 200104312 U1 - 514.74 HEL PY - 2002/// CY - Cambridge PB - Cambridge University Press KW - Harmonic maps KW - Riemannian manifolds N1 - Includes bibliographical references (p. 254-262) and index ER -