Utilizing content moderators to investigate critical factors for assessing the quality of answers on brainly, social learning Q&A platform for students: A pilot study. - Erik Choi; Michal Borkowski; Julien Zakoian; Katie Sagan; Kent Scholla; Crystal Ponti; Michal Labedz; Maciek Bielski (ASIST, 2015)

Beyond Questioning and Answering: Teens' Learning Experiences and Benefits of Social Q&A Services. - Soo Young Rieh; Erik Choi; Katie Sagan; Jennifer Colby (CSCW Companion, 2017)