1997 IUCN red list of threatened plants (1997)

The botanic gardens list of rare and threatened species (1984)

Checklists for the CORINE Biotopes Programme and its application in the PHARE countries of Central and East Europe: including comparisons with relevant conventions and agreements on the conservation of European species and habitats - WCMC (EC, 1994)

List of rare, threatened and endemic plants in Europe (1982 edition) (1983)

List of rare, threatened and endemic plants in Europe (1982 edition) (1983)