TY - CONF T1 - Measuring the citation levels of subfields as delineated by keywords: Investigating economics articles in Scopus JO - 12th International Conference on Scientometrics and Informetrics, ISSI 2009 PY - 2009/01/01 AU - Levitt JM AU - Thelwall M ED - SP - 964 EP - 965 Y2 - 2025/06/27 ER -