Vladimirov, V., Bancheva, S. and Ivanova, D. (2023) “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, 76(2), pp. 203–210. doi: 10.7546/CRABS.2023.02.04.