Albach, D. C. & Chase M. W. 2001: Paraphyly of Veronica (Veroniceae; Scrophulariaceae): Evidence from the internal transcribed spacer (ITS) sequences of nuclear ribosomal DNA. -Journal of Plant Research 114: 9-18.
Albach, D. C., Martínez Ortega, M. M., Fischer, M. A. & Chase, M. W. 2004a: Evolution of Veroniceae: A phylogenetic perspective. -Annals of the Missouri Botanical Garden 91 (2): 275-302.
Albach, D. C., Martínez Ortega, M. M., Fischer, M. A. & Chase, M. W. 2004b: A new classification of the tribe Veroniceae - problems and a possible solution. -Taxon 53 (2): 429-452.
Albach, D. C., Martinez-Ortega, M. M., Sanchez, L. D., Weiss-Schneeweiss, H., Özgökce, F. & Fischer, M. A. 2008. Chromosome numbers in Veroniceae: Review and several new counts. -Annals of the Missouri Botanical Garden 95 (4): 543-566.
Antonius, R. 2003: Interpreting quantitative data with SPSS. Sage Publications Ltd. -Thousand Oaks, CA.
Bonn, S. & Poschlod, P. 1998: Ausbreitungsbiologie der Pflanzen Mitteleuropas: Grundlagen und kulturhistorische Aspekte. -Quelle & Meyer.
Bardy, K. E., Dirk C. Albach, D. C., Schneeweiss, G. M., and Fischer, M. A. & Schönswetter, P. 2010: Disentangling phylogeography, polyploid evolution and taxonomy of a woodland herb (Veronica chamaedrys group, Plantaginaceae s.l.) in southeastern Europe. -Molecular Phylogenetics and Evolution 57 (2): 771-786.
Di Tomaso, J. M. & Healy, E. A. 2007: Weeds of California and other western states (vol. 3488). -UCANR Publications.
Duke, J. A. & Ayensu, E. S. 2006: Medicinal Plants of China. Reference Publisher Inc. -Algonac, Michigan.
Ellmounia, F. Y., Karama, M. A., Alia, R. M. & Albach, D. C. 2017: Molecular and morphometric analysis of Veronica L. section Beccabunga (Hill) Dumort. -Aquatic Botany 136: 95-111.
Ellmouni, F. Y., Karam, M., Ali, R. M. & Albach, D. C. 2018: Systematic treatment of Veronica L. Section Beccabunga (Hill) Dumort (Plantaginaceae). -Taeckholmia, 38 (1): 168-183.
Fischer, M. A. 1981: Veronica anagallis-aquatica L. In: Rechinger, K. H. (ed.), Flora Iranica. vol. 147, Scrophulariaceae. pp. 152-153. Akademische Druck-u. Verlagsanstalt. -Graz.
Freeland, J. R., Kirk, H. & Peterson S. D. 2011: Molecular ecology (2nd). -Wiley-Blackwell, UK.
Garnock-Jones, P., Albach, D. & Briggs, B. G. 2007: Botanical names in Southern Hemisphere Veronica (Plantaginaceae): Sect. Detzneria, sect. Hebe, and sect. Labiatoides. -Taxon 56 (2): 571-582.
Irl, S. D., Harter, D. E., Steinbauer, M. J., Puyol, D. G., Fernández-Palacios, J. M., Jentsch, A. & Beierkuhnlein, C. 2015: Climate vs. topography - spatial patterns of plant species diversity and endemism on a high-levation island. -Journal of Ecology 103: 1621-1633.
Judd, W. S., Sanders, R. W. & Donoghue & M. J. 1994: Angiosperm family pairs: preliminary phylogenetic analyses. -Harvard papers in Botany: 1-51.
Hammer, Ø., Harper, D. A. & Ryan, P. D. 2001: PAST: Paleontological statistics software package for education and data analysis. -Palaeontologia electronica 4 (1): 9.
Matsubara, Y. & Sakai, S. 2016: The role of flood regime on the invasive success of exotic species growing in riparian environments. -Biological invasions 18 (3): 793-808.
Mozaffarian, V. 2007: Dictionary of Iranian Plant Names: Latin-English-Persian. Farhang Moaser. -Tehran.
Muijs, D. 2004: Doing quantitative research in education with SPSS. Sage Publications Ltd. -Thousand Oaks, CA.
Pearson, K. 1901: LIII. On lines and planes of closest fit to systems of points in space. -The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 2 (11): 559-572.
Pourvahidi, P. & Ozdeniz, M. B. 2013: Bioclimatic analysis of Iranian climate for energy conservation in architecture. -Scientific Research and Essays, 8 (1): 6-16.
Saeidi-Mehrvarz, Sh. 2011: Veronica L. In Assadi, M., Maassoumi, A. A., Babakhanlou, P. & Mozaffarian, V. (Eds.), Flora of Iran, No. 68 Scrophulariaceae: PP. 75-149. Research Institute of Forests and Rangelands. -Tehran.
Santamaría, L. 2002: Why are most aquatic plants widely distributed? Dispersal, clonal growth and small-scale heterogeneity in a stressful environment. -Acta Oecologia, 23 (3): 137-154.
Scalone, R. & Albach, D.C. 2012: Degradation of sexual reproduction in Veronica filiformis after introduction to Europe. -BMC Evolutionary Biology 12: 233.
Shafie, M. S. B., Hasan, S. M. Z., Zain, A. M. & Shah, R. M. 2011: RAPD and ISSR markers for comparative analysis of genetic diversity in wormwood capillary (Artemisia capillaris) from Negeri Sembilan, Malaysia. -Journal of Medicinal Plants Research, 5 (18): 4426-4451.
Schlenker, G. 1936: Experimentelle Untersuchungen in der Sektion Beecabunga Griseb. der Gattung Veronica. -Flora oder Allgemeine Botanische Zeitung, 130 (3): 305-350.
Steinbauer, M. J., Field, R., Grytnes, J. A., Trigas, P., Ah‐Peng, C., Attorre, F. & Beierkuhnlein, C. 2016: Topography‐driven isolation, speciation and a global increase of endemism with elevation. -Global Ecology and Biogeography 25 (9): 1097-1107.
Steffen, K. & Leuschner, C. 2014: Sixty years of change in the macrophyte vegetation of north‐west German running waters: a community‐and landscape‐level analysis. -Feddes Repertorium 125 (3‐4): 98-120.
Sultan, S. E. 2003: Phenotypic plasticity in plants: a case study in ecological development. -Evolution & Development 5 (1): 25-33.
The Angiosperm Phylogeny Group (AGP) 1998: An ordinal classification for the families of flowering plants. -Annals of the Missouri Botanical Garden 85: 531-553.
The Angiosperm Phylogeny Group (AGP) 2016: An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV. -Botanical Journal of the Linnean Society 181 (1): 1-20.
https://doi.org/ 10.1111/boj.12385
Taskova, R. M., Albach, D. C. & Grayer, R. J. 2004: Phylogeny of Veronica - a combination of molecular and chemical evidence. -Plant Biology 6: 673-682.
Tyron, R.C & Baily, R. C. 1970: Cluster analysis. -McGraw-Hill, New York.
Weising, K., Nybom, H., Pfenninger, M., Wolff, K., & Kahl, G. 2005: DNA fingerprinting in plants: principles, methods, and applications. CRC press. -Boca Raton, Florida