Majumdar, Dipankar, and Swapan Bhattacharya. “Aspect Oriented Requirement Engineering: A Theme Based Vector Orientation Model”. INFOCOMP Journal of Computer Science, vol. 9, no. 1, Mar. 2010, pp. 61-69, https://infocomp.dcc.ufla.br/index.php/infocomp/article/view/291.