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2020 – today
- 2020
[j23]Peter Sjögårde
, Per Ahlgren:
Granularity of algorithmically constructed publication-level classifications of research publications: Identification of specialties. Quant. Sci. Stud. 1(1): 207-238 (2020)- [i3]Peter Sjögårde, Per Ahlgren, Ludo Waltman:
Algorithmic labeling in hierarchical classifications of publications: Evaluation of bibliographic fields and term weighting approaches. CoRR abs/2004.08090 (2020)
2010 – 2019
- 2019
- [j22]Cristian Colliander, Per Ahlgren:
Comparison of publication-level approaches to ex-post citation normalization. Sci. 120(1): 283-300 (2019) - [c5]Per Ahlgren, Yunwei Chen, Cristian Colliander, Nees Jan van Eck:
Community Detection Using Citation Relations and Textual Similarities in a Large Set of PubMed Publications. ISSI 2019: 1380-1391 - [c4]Jie-lan Ding, Zhesi Shen, Per Ahlgren, Tobias Jeppsson, David Minguillo:
How does author ethnic diversity affect scientific impact? A study of nanoscience and nanotechnology. ISSI 2019: 2606-2607 - [i2]Peter Sjögårde, Per Ahlgren:
Granularity of algorithmically constructed publication-level classifications of research publications: Identification of specialties. CoRR abs/1901.05273 (2019) - 2018
- [j21]Per Ahlgren, Cristian Colliander, Peter Sjögårde:
Exploring the relation between referencing practices and citation impact: A large-scale study based on Web of Science data. J. Assoc. Inf. Sci. Technol. 69(5): 728-743 (2018) - [j20]Peter Sjögårde, Per Ahlgren:
Granularity of algorithmically constructed publication-level classifications of research publications: Identification of topics. J. Informetrics 12(1): 133-152 (2018) - [j19]Jie-lan Ding, Per Ahlgren, Liying Yang, Ting Yue:
Disciplinary structures in Nature, Science and PNAS: journal and country levels. Sci. 116(3): 1817-1852 (2018) - [i1]Peter Sjögårde, Per Ahlgren:
Granularity of algorithmically constructed publication-level classifications of research publications: Identification of topics. CoRR abs/1801.02466 (2018) - 2017
- [j18]Guoliang Yang, Per Ahlgren, Liying Yang, Ronald Rousseau, Jie-lan Ding:
Reply to 'Comment on "Using multi-level frontiers in DEA models to grade countries/territories" by G.-l. Yang et al. [Journal of Informetrics 10(1) (2016), 238-253]'. J. Informetrics 11(3): 647-648 (2017) - [j17]Sichao Tong, Per Ahlgren:
Evolution of three Nobel Prize themes and a Nobel snub theme in chemistry: a bibliometric study with focus on international collaboration. Sci. 112(1): 75-90 (2017) - 2016
- [j16]Guoliang Yang, Per Ahlgren, Liying Yang, Ronald Rousseau, Jie-lan Ding:
Using multi-level frontiers in DEA models to grade countries/territories. J. Informetrics 10(1): 238-253 (2016) - 2015
- [j15]Per Ahlgren, Peter Pagin, Olle Persson, Maria Svedberg:
Bibliometric analysis of two subdomains in philosophy: free will and sorites. Sci. 103(1): 47-73 (2015) - [c3]Guoliang Yang, Per Ahlgren, Liying Yang, Ronald Rousseau, Jie-lan Ding:
Grading Countries/Territories Using DEA Frontiers. ISSI 2015 - 2014
- [j14]Per Ahlgren, Ludo Waltman:
The correlation between citation-based and expert-based assessments of publication channels: SNIP and SJR vs. Norwegian quality assessments. J. Informetrics 8(4): 985-996 (2014) - 2013
- [j13]Per Ahlgren, Olle Persson, Robert J. W. Tijssen:
Geographical distance in bibliometric relations within epistemic communities. Sci. 95(2): 771-784 (2013) - 2012
- [j12]Cristian Colliander, Per Ahlgren:
Experimental comparison of first and second-order similarities in a scientometric context. Sci. 90(2): 675-685 (2012) - [j11]Per Ahlgren, Cristian Colliander, Olle Persson:
Field normalized citation rates, field normalized journal impact and Norwegian weights for allocation of university research funds. Sci. 92(3): 767-780 (2012) - 2011
- [j10]Cristian Colliander, Per Ahlgren:
The effects and their stability of field normalization baseline on relative performance with respect to citation impact: A case study of 20 natural science departments. J. Informetrics 5(1): 101-113 (2011) - 2010
- [j9]Per Ahlgren, Kalervo Järvelin:
Measuring impact of twelve information scientists using the DCI index. J. Assoc. Inf. Sci. Technol. 61(7): 1424-1439 (2010)
2000 – 2009
- 2009
- [j8]Per Ahlgren, Cristian Colliander:
Document-document similarity approaches and science mapping: Experimental comparison of five approaches. J. Informetrics 3(1): 49-63 (2009) - 2008
- [j7]Per Ahlgren, Leif Grönqvist:
Evaluation of retrieval effectiveness with incomplete relevance data: Theoretical and experimental comparison of three measures. Inf. Process. Manag. 44(1): 212-225 (2008) - [j6]Per Ahlgren, Bo Jarneving:
Bibliographic coupling, common abstract stems and clustering: A comparison of two document-document similarity approaches in the context of science mapping. Sci. 76(2): 273-290 (2008) - 2007
- [j5]Per Ahlgren, Jaana Kekäläinen:
Indexing strategies for Swedish full text retrieval under different user scenarios. Inf. Process. Manag. 43(1): 81-102 (2007) - 2006
- [j4]Per Ahlgren, Jaana Kekäläinen:
Swedish full text retrieval: Effectiveness of different combinations of indexing strategies with query terms. Inf. Retr. 9(6): 681-697 (2006) - [c2]Per Ahlgren, Leif Grönqvist:
Retrieval evaluation with incomplete relevance data: a comparative study of three measures. CIKM 2006: 872-873 - 2004
- [j3]Per Ahlgren, Bo Jarneving, Ronald Rousseau:
Author cocitation analysis and Pearson's r. J. Assoc. Inf. Sci. Technol. 55(9): 843 (2004) - [j2]Per Ahlgren, Bo Jarneving, Ronald Rousseau:
Rejoinder: In defense of formal methods. J. Assoc. Inf. Sci. Technol. 55(10): 936 (2004) - 2003
- [j1]Per Ahlgren, Bo Jarneving, Ronald Rousseau:
Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient. J. Assoc. Inf. Sci. Technol. 54(6): 550-560 (2003)
1990 – 1999
- 1999
- [c1]Per Ahlgren:
On a Cognitive Search Strategy. CoLIS 1999
Coauthor Index
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