@book{bhlpg31085568, title = {1997 IUCN red list of threatened plants }, volume = {1997}, url = {https://www.biodiversitylibrary.org/page/31085568}, publisher = {}, author = {}, year = {1997}, pages = {Page 209}, } @book{bhlpg31186073, title = {List of rare, threatened and endemic plants in Europe (1982 edition) }, volume = {1983}, url = {https://www.biodiversitylibrary.org/page/31186073}, publisher = {}, author = {}, year = {1983}, pages = {Page 336}, } @book{bhlpg31186087, title = {List of rare, threatened and endemic plants in Europe (1982 edition) }, volume = {1983}, url = {https://www.biodiversitylibrary.org/page/31186087}, publisher = {}, author = {}, year = {1983}, pages = {Page 350}, }