@unpublished{ChenHidetoshi2008,
  author  = {Hua Chen and Tahara Hidetoshi},
  title   = {On the holomorphic solution of non-linear totally characteristic equations},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprint},
  number    = {(1998) 20},
  year    = {2008},
}