This map shows the geographic impact of S. Ivancheva'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 S. Ivancheva with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites S. Ivancheva more than expected).
This network shows the impact of papers produced by S. Ivancheva. 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 S. Ivancheva. The network helps show where S. Ivancheva may publish in the future.
Co-authorship network of co-authors of S. Ivancheva
This figure shows the co-authorship network connecting the top 25 collaborators of S. Ivancheva.
A scholar is included among the top collaborators of S. Ivancheva 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 S. Ivancheva. S. Ivancheva is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Ivancheva, S., et al.. (2006). Pharmacological activities and biologically active compounds of Bulgarian medicinal plants.. 87–103.39 indexed citations
4.
Nikolova, Milena & S. Ivancheva. (2005). Quantitative flavonoid variations of Artemisia vulgaris L. and Veronica chamaedrys L. in relation to altitude and polluted environment. Acta Biologica Szegediensis. 49. 29–32.27 indexed citations
5.
Nikolova, Milena, Strahil Berkov, & S. Ivancheva. (2004). A rapid TLC method for analysis of external flavonoid aglycones in plant exudates. Acta Chromatographica. 110–114.12 indexed citations
6.
Toshkova, Reneta, et al.. (2004). In vitro investigation on the effect of a plant preparation with antiviral activity on the functions of mice phagocyte cells.. PubMed. 59(2). 150–4.14 indexed citations
Ivancheva, S., et al.. (2003). Distribution of flavonoid aglycones in tribe Anthemideae (Asteraceae).. 85–95.4 indexed citations
9.
Ivancheva, S., et al.. (2002). Comparative Analysis of Flavonoids in Achillea sp. sect. Millefolium and sect. Ptarmica. Comptes Rendus De L Academie Bulgare Des Sciences. 55. 5.7 indexed citations
Ivancheva, S., et al.. (1998). WPLYW BLISKOSCI CIAGOW KOMUNIKACYJNYCH NA SKLAD CHEMICZNY ACHILLEA MILLEFOLIUM L. I TANACETUM VULGARE L.. Herba Polonica. 44(4). 353–360.
13.
Ivancheva, S., et al.. (1997). Wpływ skażenia środowiska na skład frakcji polifenolowej i zawartość biopierwiastków w Achillea millefolium L. i Tanacetum vulgare L.. Herba Polonica. 43(4). 412–416.
14.
Ivancheva, S., et al.. (1995). Flavonoids in Tanacetum vulgare. Fitoterapia. 66(4).2 indexed citations
Manolova, Nevena, et al.. (1986). [Antiviral action of a polyphenol complex isolated from the medicinal plant Geranium sanguineum L. II. Its inactivating action on the influenza virus].. PubMed. 18. 78–82.1 indexed citations
Ivancheva, S., et al.. (1977). Studies on the central depressive action of methanol extract from Geranium macrorrhizum L.. PubMed. 30(11). 1657–9.1 indexed citations
20.
Ivancheva, S., et al.. (1974). [Chemistry and pharmacology of flavonoid fractions with hypotensive action extracted from geranium].. PubMed. 13(1). 29–36.1 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.