1. Mitchell, J.: From Telehealth to e-health: The Unstoppable Rise of e-health. Commonwealth Department of Communications, Information Technology and the Arts, Australia (1999)
2. Della Mea, V.: What is e-Health (2): the death of telemedicine? J. Med. Internet Res. 3(2), e22 (2001)
3. Oh, H., et al.: What Is eHealth (3): a systematic review of published definitions. J. Med. Internet Res. 7(1), e1 (2005)
4. eHealth Industries Innovation Centre: What is eHealth? a new definition for eHealth. http://www.ehi2.swan.ac.uk/en/what-is-ehealth.htm
5. Svensson, P.-G.: eHealth applications in health care management. eHealth Int. 1, 5 (2002)