User Perception of Numeric Contribution Semantics for Goal Models: An Exploratory Experiment. - Norah Alothman; Mehrnaz Zhian; Sotirios Liaskos (ER, 2017)

Beyond Boxes and Lines: Creating and Empirically Evaluating Alternative Visualizations for Requirements Conceptual Models. - Sotirios Liaskos; Teodora Dundjerovic; Norah Alothman (ESEM, 2017)

On the Meaning and Use of Contribution Links. - Sotirios Liaskos; Norah Alothman; Alexis Ronse; Wisal Tambosi (iStar@ER, 2019)