Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
This map shows the geographic impact of Zita Martins'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 Zita Martins with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Zita Martins more than expected).
This network shows the impact of papers produced by Zita Martins. 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 Zita Martins. The network helps show where Zita Martins may publish in the future.
Co-authorship network of co-authors of Zita Martins
This figure shows the co-authorship network connecting the top 25 collaborators of Zita Martins.
A scholar is included among the top collaborators of Zita Martins 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 Zita Martins. Zita Martins is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Martins, Zita, Q. H. S. Chan, & Mark A. Sephton. (2010). Fluorescence spectroscopy as a life detection technique. 600.1 indexed citations
12.
Ehrenfreund, P., Bernard Foing, C. Stoker, et al.. (2010). EuroGeoMars Field Campaign: Sample Analysis of Organic Matter and Minerals. LPI. 1723.2 indexed citations
13.
Martins, Zita, et al.. (2010). Life Detection and Organic Characterization in the Solar System. 1538. 5233.1 indexed citations
14.
Foing, Bernard, C. Stoker, P. Ehrenfreund, et al.. (2010). Eurogeomars Field Campaingn: Sample Analysis of Organic Matter and Minerals. LPICo. 1538. 5656.2 indexed citations
15.
Fehr, Manuela A., Rachael H. James, Mark A. Sephton, Zita Martins, & P. A. Bland. (2009). Primitive lithium isotope signatures in CR carbonaceous chondrites. Open Research Online (The Open University). 73.2 indexed citations
16.
Martins, Zita, C. M. O'd. Alexander, Grazyna E. Orzechowska, et al.. (2008). Amino Acid Composition of Primitive CR2 Chondrites. M&PSA. 43. 5195.4 indexed citations
17.
Peeters, Z., R. C. Quinn, Zita Martins, et al.. (2008). Mars Regolith Analogues - Interactions Between Mineralogical and Organic Compounds. LPI. 1742.4 indexed citations
18.
Martins, Zita, C. M. O'd. Alexander, Grazyna E. Orzechowska, et al.. (2007). Indigenous Amino Acids Present in CR Primitive Meteorites. Meteoritics and Planetary Science Supplement. 42. 5210.1 indexed citations
19.
Ehrenfreund, P., R. Ruiterkamp, Z. Peeters, et al.. (2006). The ORGANICS experiments on BIOPAN V: UV and space exposure of aromatic compounds. 36. 3635.2 indexed citations
20.
Martins, Zita, Oliver Botta, Mark A. Sephton, & P. Ehrenfreund. (2004). Purines and Pyrimidines in Carbonaceous Chondrites: A Re-Analysis. M&PSA. 39. 5145.
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.