RefMed: relevance feedback retrieval system fo PubMed. - Hwanjo Yu; Taehoon Kim; Jinoh Oh; Ilhwan Ko; Sungchul Kim (CIKM, 2009)

Enabling multi-level relevance feedback on PubMed by integrating rank learning into DBMS. - Hwanjo Yu; Taehoon Kim; Jinoh Oh; Ilhwan Ko; Sungchul Kim; Wook-Shin Han (BMC Bioinform., 2010)

Exact indexing for support vector machines. - Hwanjo Yu; Ilhwan Ko; Youngdae Kim; Seung-won Hwang; Wook-Shin Han (SIGMOD Conference, 2011)

iKernel: Exact indexing for support vector machines. - Youngdae Kim; Ilhwan Ko; Wook-Shin Han; Hwanjo Yu (Inf. Sci., 2014)