scientific article published in 1978

scientific article published on 31 May 2012

scientific article published in January 1993

scientific article published in January 1994

scientific article published in January 1995

article by M.C. Roos et al published 30 October 2009 in Blumea

scholarly article

scientific article published in 1985

scientific article published in 1984

scientific article published in November 2012

scientific article published in 1983

scientific article published in 2007

scientific article published in 2010

scientific article published in 2005

scientific article published in 1996

scientific article published in January 1993

scientific article published in 2002