S. Shrestha. Proceedings of the 4th international conference on mobile technology, applications, and systems and the 1st international symposium on Computer human interaction in mobile technology, page 187--194. Singapore, ACM, (2007)
L. Pagani, I. Gyssens, B. Huttner, D. Nathwani, and S. Harbarth. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 48 (5):
626--632(March 2009)PMID: 19191651.
P. Gastmeier, D. Sohr, C. Geffers, M. Behnke, and H. Rüden. Infection Control and Hospital Epidemiology: The Official Journal of the Society of Hospital Epidemiologists of America, 28 (4):
466--72(April 2007)PMID: 17385154.