relatively untouched natural areas that have not been significantly modified by human activity, including core areas for nature on land or at sea where nature and wildlife thrive (en)
The European Environment State and Outlook 2010 - Biodiversity , http://www.ypeka.gr/LinkClick.aspx?fileticket=VuMhmsuw2V8%3D&tabid=37&language=en-US. (en)