VLADIMIROV, V.; BANCHEVA, S.; IVANOVA, D. Contribution to the Knowledge of Pontechium maculatum(Boraginaceae), a Species of High Conservation Concern in the Bulgarian Flora. Proceedings of the Bulgarian Academy of Sciences, Sofia, Bulgaria, v. 76, n. 2, p. 203–210, 2023. DOI: 10.7546/CRABS.2023.02.04. Disponível em: https://proceedings.bas.bg/index.php/cr/article/view/249. Acesso em: 23 mar. 2023.