“…This method has been used to obtain important results about harmonic maps on Lie groups and homogeneous space, see for example Dai-Shoji-Urakawa [4], Higaki [10], Khemar [11], Dorfmeister-Inoguchi-Kobayashi [5], Sharper [14], Uhlenbeck [16]. Finally, interesting theorems and nice examples are founded in two papers of Urakawa (see [17] and [18]).…”