Document-document similarity approaches and science mapping: Experimental comparison of five approaches. - Per Ahlgren; Cristian Colliander (J. Informetrics, 2009)

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. - Cristian Colliander; Per Ahlgren (J. Informetrics, 2011)

Field normalized citation rates, field normalized journal impact and Norwegian weights for allocation of university research funds. - Per Ahlgren; Cristian Colliander; Olle Persson (Scientometrics, 2012)

Experimental comparison of first and second-order similarities in a scientometric context. - Cristian Colliander; Per Ahlgren (Scientometrics, 2012)

A novel approach to citation normalization: A similarity-based method for creating reference sets. - Cristian Colliander (J. Assoc. Inf. Sci. Technol., 2015)

Exploring the relation between referencing practices and citation impact: A large-scale study based on Web of Science data. - Per Ahlgren; Cristian Colliander; Peter Sjögårde (J. Assoc. Inf. Sci. Technol., 2018)

Community Detection Using Citation Relations and Textual Similarities in a Large Set of PubMed Publications. - Per Ahlgren; Yunwei Chen; Cristian Colliander; Nees Jan van Eck (ISSI, 2019)

Comparison of publication-level approaches to ex-post citation normalization. - Cristian Colliander; Per Ahlgren (Scientometrics, 2019)

Enhancing direct citations: A comparison of relatedness measures for community detection in a large set of PubMed publications. - Per Ahlgren; Yunwei Chen; Cristian Colliander; Nees Jan van Eck (Quant. Sci. Stud., 2020)

Early career performance and its correlation with gender and publication output during doctoral education. - Jonas Lindahl; Cristian Colliander; Rickard Danell (Scientometrics, 2020)