Pedro Valderas Joan Fons Vicente Pelechano Using Task Descriptions for the Specification of Web Application Requirements. 257-268 2005 conf/wer/2005 WER http://wer.inf.puc-rio.br/WERpapers/artigos/artigos_WER05/pedro_valderas.pdf db/conf/wer/wer2005.html#ValderasFP05