This map shows the geographic impact of Rossen Tzonev's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Rossen Tzonev with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Rossen Tzonev more than expected).
This network shows the impact of papers produced by Rossen Tzonev. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Rossen Tzonev. The network helps show where Rossen Tzonev may publish in the future.
Co-authorship network of co-authors of Rossen Tzonev
This figure shows the co-authorship network connecting the top 25 collaborators of Rossen Tzonev.
A scholar is included among the top collaborators of Rossen Tzonev based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with Rossen Tzonev. Rossen Tzonev is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Boteva, Silvena, et al.. (2021). Agricultural landscapes development and its subsequent impact in terms of common agricultural policy the case of South Western planning region in Bulgaria. Bulgarian Journal of Agricultural Science.
6.
Tzonev, Rossen, et al.. (2019). Circaea alpina (Onagraceae) – a poorly known species in the Bulgarian flora. Phytologia Balcanica. 25(3). 261–265.
7.
Tzonev, Rossen. (2017). Two new associations from the herbaceous riparian vegetation in the Central Danubian Plain, Bulgaria. Phytologia Balcanica. 23(2). 271–280.7 indexed citations
8.
Uzunova, E., et al.. (2017). INLAND AQUACULTURE DEVELOPMENT IN THE NATURA 2000 SITES IN BULGARIA: ECOLOGICAL APPROACH AND AQUA-ENVIRONMENTAL MEASURES. Bulgarian Journal of Agricultural Science.1 indexed citations
9.
Vasileva, Viliana, et al.. (2017). SUBTERRANEAN CLOVER (TRIFOLIUM SUBTERRANEUM L.) AS A PROMISING FORAGE SPECIES IN BULGARIA. Bulgarian Journal of Agricultural Science.1 indexed citations
10.
Tzonev, Rossen, et al.. (2016). The future of submeasure “Pastoralism” of Measure 214 “Agroecological payments” in the Rural Development Programme of Bulgaria: advantages, disadvantages and challenges. Bulgarian Portal for Open Science. 22(2). 167–177.2 indexed citations
11.
Tzonev, Rossen, et al.. (2015). Mapping out the habitats of conservation importance in the subalpine and alpine northern marble divide of the Pirin National Park (Bulgaria). Phytologia Balcanica. 21(1). 43–51.
Tzonev, Rossen. (2013). New plant associations from Danubian Plain, Bulgaria. Phytologia Balcanica. 19(2). 243–266.3 indexed citations
14.
Tzonev, Rossen, et al.. (2013). Study of the vegetation and habitats of the Ranislavtsi Refugial Complex of wet meadows, Kostinbrod Municipality, West Bulgaria. Phytologia Balcanica. 19(3). 361–372.1 indexed citations
15.
Tzonev, Rossen, et al.. (2011). Ecological characteristics of the floristic complex of the chestnut (Castanea sativa Mill.) forests in Belasitsa Mountain.. 12(1). 47–61.1 indexed citations
16.
Hájek, Michal, Rossen Tzonev, Petra Hájková, Anna Ganeva, & Iva Apostolova. (2005). Plant communities of the subalpine mires and springs in theVitosha Mt.. Phytologia Balcanica.7 indexed citations
17.
Tzonev, Rossen & Kateřina Šumberová. (2004). New data on the chorology of some little known adventivespecies on the banks of the Danube River in Bulgaria. Phytologia Balcanica.3 indexed citations
18.
Šumberová, Kateřina, Rossen Tzonev, & Владимир Владимиров. (2004). Bidens frondosa (Asteraceae) - a new alien species for the Bulgarian flora. Phytologia Balcanica. 10.8 indexed citations
19.
Tzonev, Rossen, Jerzy Zieliński, & Kit Tan. (2003). "Cyperus strigosus" (cyperceae), a naturalized species new to Bulgaria. Polish Botanical Journal. 48(1). 47–49.4 indexed citations
20.
Dimitrov, Dimitar & Rossen Tzonev. (2002). On the distribution of Ambrosia artemisiifolia L. (Asteraceae) in Bulgaria. Phytologia Balcanica. 8(1).9 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.