@book{bhlpg31085645, title = {1997 IUCN red list of threatened plants }, volume = {1997}, url = {https://www.biodiversitylibrary.org/page/31085645}, publisher = {}, author = {}, year = {1997}, pages = {Page 291}, } @book{bhlpg2205891, title = {Just's Botanischer Jahresbericht }, volume = {Jahrg.27:Abt.1 (1899)}, url = {https://www.biodiversitylibrary.org/page/2205891}, publisher = {Gebruder Borntraeger}, author = {Just, Johann Leopold, 1841 -1891}, year = {1899}, } @book{bhlpg31185897, title = {List of rare, threatened and endemic plants in Europe (1982 edition) }, volume = {1983}, url = {https://www.biodiversitylibrary.org/page/31185897}, publisher = {}, author = {}, year = {1983}, pages = {Page 160}, } @book{bhlpg31185852, title = {List of rare, threatened and endemic plants in Europe (1982 edition) }, volume = {1983}, url = {https://www.biodiversitylibrary.org/page/31185852}, publisher = {}, author = {}, year = {1983}, pages = {Page 115}, } @book{bhlpg38692470, title = {Preliminary draft list of plant species for inclusion in a 'Responsibility List' of European plants }, volume = {1989}, url = {https://www.biodiversitylibrary.org/page/38692470}, publisher = {WCMC}, author = {WCMC }, year = {1989}, pages = {Page 57}, }