@book{OPUS4-20160,
  title     = {Introdu{\c{c}}{\~a}o {\`a} ortografia de Echuwabu},
  edition   = {Primeira edi{\c{c}}{\~a}o electr{\´o}ni},
  url       = {http://lidemo.net/2010/docs/chw\_v000399.pdf},
  year      = {2011}
}