Software Development Issues of a Distributed Mobile-Commerce System. - Duc Phuong Nguyen; Christian Kern; Christian Wattinger; Martin Guggisberg; Helmar Burkhart; Peter Maier (IASTED PDCS, 2005)

Problem-Based Learning Using Mobile Devices. - Christian Wattinger; Duc Phuong Nguyen; Peter Fornaro; Martin Guggisberg; Tibor Gyalog; Helmar Burkhart (ICALT, 2006)