Human behavior in online social networks. - Joshua J. Gillen; Mark B. Freeman; Holly Tootell (ISTAS, 2017)

Volunteering Engagement: The effects of COVID-19. - Joshua J. Gillen; Mark B. Freeman; Holly Tootell (ACIS, 2022)

Sustaining Volunteering in Turbulent Times: A Study of the Use of Social Media for the 2022 UCI Road World Championships. - Joshua J. Gillen; Mark B. Freeman (ACIS, 2023)