Supporting Multi-device for Ubiquitous Learning. - Byoungchol Chang; Mokhwa Lim; Dall-ho Ham; Yoonsoo Lee; Sooyong Kang; Jaehyuk Cha (Edutainment, 2007)

Educational Information Search Service Using Ontology. - Byoungchol Chang; Dall-ho Ham; Daesung Moon; Yong Suk Choi; Jaehyuk Cha (ICALT, 2007)

Using Ontologies to Search Learning Resources. - Byoungchol Chang; Dall-ho Ham; Daesung Moon; Yong Suk Choi; Jaehyuk Cha (ICCSA (1), 2007)