Per Ahlgren

Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient

Per Ahlgren, Bo Jarneving, Ronald Rousseau · Journal of the American Society for Information Science and Technology · 2003 · 797 citations

Engineering, Measurement, Similarity Measure +16

Removal of Wood Components During Chlorite Delignification of Black Spruce

Per Ahlgren, D. A. I. Goring · Canadian Journal of Chemistry · 1971 · 155 citations

Biomass Utilization, Chemical Engineering, Engineering +15

Acid hydrolysis of some industrial pulps: effect of hydrolysis conditions and raw material

Helena H�kansson, Per Ahlgren · Cellulose · 2005 · 120 citations

Chemical Engineering, Industrial Pulps, Engineering +7

Document–document similarity approaches and science mapping: Experimental comparison of five approaches

Per Ahlgren, Cristian Colliander · Journal of Informetrics · 2009 · 91 citations

Document–document Similarity Approaches, Document Clustering, Engineering +8

Bibliographic coupling, common abstract stems and clustering: A comparison of two document-document similarity approaches in the context of science mapping

Per Ahlgren, Bo Jarneving · Scientometrics · 2008 · 49 citations

Document Clustering, Abstract Analysis, Engineering +13