Stefan Ungricht

One century of vegetation change on Isla Persa, a nunatak in the Bernina massif in the Swiss Alps

Gian-Reto Walther, Pascal Vittoz, G. Walther, 2008 .

How many plant species are there? And how many are threatened with extinction? Endemic species in global biodiversity and conservation assessments

Stefan Ungricht, Stefan Ungricht, 2004 .