Halpern, M. K., M. Evjen, D. Cosley, M. Lin, S. Tseou, E. Horowitz, T. Peesapati, and G. Gay. “SunDial: Embodied Informal Science Education Using GPS”. MedieKultur: Journal of Media and Communication Research, vol. 27, no. 50, June 2011, p. 18 p., doi:10.7146/mediekultur.v27i50.3341.