Comparison of online social relations in volume vs interaction: a case study of cyworld. - Hyunwoo Chun; Haewoon Kwak; Young-Ho Eom; Yong-Yeol Ahn; Sue B. Moon; Hawoong Jeong (Internet Measurement Conference, 2008)

Fragile online relationship: a first look at unfollow dynamics in twitter. - Haewoon Kwak; Hyunwoo Chun; Sue B. Moon (CHI, 2011)

"Novel aspects coming from the directionality of online relationships: a case study of Twitter" by Haewoon Kwak, Changhyun Lee, Hosung Park, Hyunwoo Chun and Sue Moon with Ching-man Au Yeung as coordinator. - Haewoon Kwak; Changhyun Lee; Hosung Park; Hyunwoo Chun; Sue B. Moon (SIGWEB Newsl., 2011)