@incollection{JEDP_2002____A9_0,
     author = {Kappeler, Thomas},
     title = {Perturbations of the harmonic map equation},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {9},
     pages = {1--9},
     publisher = {Universit\'e de Nantes},
     year = {2002},
     doi = {10.5802/jedp.607},
     mrnumber = {1968205},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/jedp.607/}
}