Source: https://www.researchgate.net/profile/Negrea-Mihai/publication/47334396_Endemic_rare_or_protected_cormophytes_from_Neagra_Brostenilor_basin_Eastern_Carpathians/links/02e7e5275510e4335d000000/Endemic-rare-or-protected-cormophytes-from-Neagra-Brostenilor-basin-Eastern-Carpathians.pdf