Citations per year, relative to C. L. Harper C. L. Harper (= 1×)
peers
Stephen Collins
Countries citing papers authored by C. L. Harper
Since
Specialization
Citations
This map shows the geographic impact of C. L. Harper'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 C. L. Harper with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites C. L. Harper more than expected).
This network shows the impact of papers produced by C. L. Harper. 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 C. L. Harper. The network helps show where C. L. Harper may publish in the future.
Co-authorship network of co-authors of C. L. Harper
This figure shows the co-authorship network connecting the top 25 collaborators of C. L. Harper.
A scholar is included among the top collaborators of C. L. Harper 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 C. L. Harper. C. L. Harper is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Harper, C. L. & S. B. Jacobsen. (1994). Investigations of the 182 Hf- 182 W Systematics. Lunar and Planetary Science Conference. 509.3 indexed citations
Jacobsen, S. B. & C. L. Harper. (1993). Constraints on the differentiation of the Earth from the coupled Sm-146,147-Nd-142,143 systematics. 709.3 indexed citations
8.
Harper, C. L. & S. B. Jacobsen. (1993). Nd-142/Nd-144 in bulk planetary reservoirs, the problem of incomplete mixing of interstellar components and significance of very high precision Nd-145/Nd-144 measurements. NASA Technical Reports Server (NASA). 607.1 indexed citations
9.
Harper, C. L. & H. Wiesmann. (1992). High Precision Investigations of the 53Mn-53Cr Systematics. I. Bulk Carbonaceous Chondrites, Planetary Reservoirs and the Moon. Lunar and Planetary Science Conference. 23. 489.5 indexed citations
10.
Harper, C. L. & S. B. Jacobsen. (1992). 146,147Sm-142,143 Nd Systematics of Early Terrestrial Differentiation. Lunar and Planetary Science Conference. 23. 487.4 indexed citations
11.
Harper, C. L., H. Wiesmann, & L. E. Nyquist. (1991). 135 Cs- 135 Ba: Very high precision isotopic investigations and a new cosmochronometric constraint on the astrophysical site of the origin of the solar system. Meteoritics and Planetary Science. 26. 341.5 indexed citations
12.
Harper, C. L., et al.. (1991). 182Hf-182W: New Cosmochronometric Constraints on Terrestrial Accretion, Core Formation, the Astrophysical Site of the r-Process, and the Origin of the Solar System. Lunar and Planetary Science Conference. 22. 515.20 indexed citations
13.
Harper, C. L.. (1991). 53Mn and 146Sm: Alive and Well in an Angrite Magma. Lunar and Planetary Science Conference. 22. 989.6 indexed citations
14.
Harper, C. L., H. Wiesmann, L. E. Nyquist, et al.. (1991). Interpretation of the (super 50) Ti- (super 96) Zr anomaly correlation in CAI; NNSE Zr production limits and S/ R/ P decomposition of the bulk solar system zirconium abundances. 22. 517–518.4 indexed citations
15.
Harper, C. L., H. Wiesmann, L. E. Nyquist, et al.. (1991). 92Nb/93Nb and 92Nb/146Sm Ratios of the Early Solar System: Observations and Comparison of p-Process and Spallation Models. Lunar and Planetary Science Conference. 22. 519.1 indexed citations
16.
Nyquist, L. E., C. L. Harper, H. Wiesmann, B. M. Bansal, & C. Y. Shih. (1991). 142 Nd/ 144 Nd in SNCs and lunar samples: Implications for early differentiation of a heterogeneous Martian (?) mantle. Meteoritics and Planetary Science. 26. 381.19 indexed citations
17.
Nyquist, L. E., C. L. Harper, H. Wiesmann, B. M. Bansal, & C. Y. Shih. (1991). Nd-142/Nd-144 in SNCs and early differentiation of a heterogeneous Martian mantle. NASA Technical Reports Server (NASA). 54. 178.1 indexed citations
18.
Harper, C. L., L. E. Nyquist, C.‐Y. Shih, & H. Wiesmann. (1990). Correlated 96 Zr- 50,49,47 Ti anomalies in Allende CAI: A new constraint on the origin of the neutron-rich iron peak e-process anomaly suite. Metic. 25. 369.1 indexed citations
19.
Harper, C. L., et al.. (1990). Zirconium Isotopes as an Astrophysical Probe of the Nucleosynthetic Source Conditions of Primitive Solar System "Components". LPI. 21. 453.1 indexed citations
20.
Harper, C. L., et al.. (1983). Attitudes of faculty members of schools of public health toward public service.. PubMed. 98(2). 145–52.1 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.