Ruzanna Chitchyan Awais Rashid Peter Sawyer Comparing Requirement Engineering Approaches for Handling Crosscutting Concerns. 1-12 2005 conf/wer/2005 WER http://wer.inf.puc-rio.br/WERpapers/artigos/artigos_WER05/ruzzana_chitchyan.pdf db/conf/wer/wer2005.html#ChitchyanRS05