The impact of 3-D based group interactions in an on-line problem-based learning environment. - Nicholas Omale; Wei-Chen Hung; Lara Luetkehans; Jessamine Cooke-Plagwitz (CSCL, 2007)

Learning in 3-D multiuser virtual environments: Exploring the use of unique 3-D attributes for online problem-based learning. - Nicholas Omale; Wei-Chen Hung; Lara Luetkehans; Jessamine Cooke-Plagwitz (Br. J. Educ. Technol., 2009)