This map shows the geographic impact of E. Ptak'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 E. Ptak with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites E. Ptak more than expected).
This network shows the impact of papers produced by E. Ptak. 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 E. Ptak. The network helps show where E. Ptak may publish in the future.
Co-authorship network of co-authors of E. Ptak
This figure shows the co-authorship network connecting the top 25 collaborators of E. Ptak.
A scholar is included among the top collaborators of E. Ptak 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 E. Ptak. E. Ptak is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Ptak, E., et al.. (2017). Genetic parameters for lactose percentage and urea concentration in milk of Polish Holstein‑Friesian cows. Animal Science Papers and Reports. 35(2). 159–172.9 indexed citations
Ptak, E., et al.. (2015). Genetic analysis of lactation persistency in the Polish Holstein-Friesian cows. Animal Science Papers and Reports. 33(2). 109–117.8 indexed citations
9.
Ptak, E., et al.. (2009). Genetic parameters of daily somatic cell score and some conformation traits in Polish Holstein cattle.. Annals of Animal Science. 9(4). 355–361.7 indexed citations
10.
Ptak, E., et al.. (2008). Wplyw roku, sezonu i wieku wycielenia na zawartosc komorek somatycznych w mleku krow rasy polskiej holsztynsko-fryzyjskiej odmiany czarno-bialej. Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego. 4(2). 29–36.
Jagusiak, W., et al.. (2004). Relationship between udder conformation and somatic cell score in Polish Black-and-White cattle. 22(2).1 indexed citations
14.
Ptak, E., W. Jagusiak, & J. Jamrozik. (2004). Estimates of heritability for first and second lactation test-day milk production in Polish Black-and-White cattle. 22(2).1 indexed citations
15.
Strabel, T., E. Ptak, Joanna Szyda, & J. Jamrozik. (2004). Multiple-lactation random regression test-day model for Polish Black and White cattle. Bulletin - International Bull Evaluation Service/Interbull bulletin. 133.12 indexed citations
16.
Strabel, T., E. Ptak, Joanna Szyda, & J. Jamrozik. (2004). Estimates of genetic parameters for protein yield of Polish Black-and-White cattle with multiple-lactation rendom regression test-day model. 22(2).1 indexed citations
17.
Ptak, E., et al.. (2004). Prediction of 305-day lactation milk, fat and protein yields using Legendre polynomials and test-day yields from different parts of lactation. Animal Science Papers and Reports. 22(2). 173–183.5 indexed citations
18.
Strabel, T., Joanna Szyda, E. Ptak, & J. Jamrozik. (2003). Comparison of random regression test-day models for production traits of dairy cattle in Poland. Bulletin - International Bull Evaluation Service/Interbull bulletin. 197.6 indexed citations
19.
Ptak, E., et al.. (1994). Comparison of growth curves of purebred and crossbred rabbits.. Proceedings of the World Congress on Genetics applied to Livestock Production. 201–204.4 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.