@book{bhlpg31085887, title = {1997 IUCN red list of threatened plants }, volume = {1997}, url = {https://www.biodiversitylibrary.org/page/31085887}, publisher = {}, author = {}, year = {1997}, pages = {Page 528}, } @book{bhlpg31185998, title = {List of rare, threatened and endemic plants in Europe (1982 edition) }, volume = {1983}, url = {https://www.biodiversitylibrary.org/page/31185998}, publisher = {}, author = {}, year = {1983}, pages = {Page 261}, } @book{bhlpg31185883, title = {List of rare, threatened and endemic plants in Europe (1982 edition) }, volume = {1983}, url = {https://www.biodiversitylibrary.org/page/31185883}, publisher = {}, author = {}, year = {1983}, pages = {Page 146}, } @book{bhlpg38692546, title = {Preliminary draft list of plant species for inclusion in a 'Responsibility List' of European plants }, volume = {1989}, url = {https://www.biodiversitylibrary.org/page/38692546}, publisher = {WCMC}, author = {WCMC }, year = {1989}, pages = {Page 75}, }