Huiying Xu, Zhi Jin. An Agent-Oriented Requirement Graphic Symbol Representation and Formalization Modeling Method. In Mark Burgin, Masud H. Chowdhury, Chan H. Ham, Simone A. Ludwig, Weilian Su, Sumanth Yenduri, editors, CSIE 2009, 2009 WRI World Congress on Computer Science and Information Engineering, March 31 - April 2, 2009, Los Angeles, California, USA, 7 Volumes. pages 569-574, IEEE Computer Society, 2009. [doi]