Tereza Gonçalves Kirner,  Valéria Farinazzo Martins Salvador. 

This paper aims to contribute to the elicitation, specification, and evaluation of requirements applied to the development of virtual environments. Requirements engineering is characterized, based on existing concepts and on experience obtained through the development of three virtual environments. The requirements engineering process is described and exemplified and the main conclusions are pointed out

http://wer.inf.puc-rio.br/WERpapers/artigos/artigos_WER04/Tereza_Kirner.pdf

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