Representing Emoji Usage Using Directed Networks: A Twitter Case Study. - Halley Fede; Isaiah Herrera; S. M. Mahdi Seyednezhad; Ronaldo Menezes (COMPLEX NETWORKS, 2017)

Emoji-Word Network Analysis: Sentiments and Semantics. - Seyed M. Mahdi Seyednezhad; Halley Fede; Isaiah Herrera; Ronaldo Menezes (FLAIRS, 2018)