TY - JOUR T1 - Sources of Google Scholar citations outside the Science Citation Index: A comparison between four science disciplines JO - Scientometrics UR - http://dx.doi.org/10.1007/s11192-008-0217-x PY - 2007/11/28 AU - Kousha K AU - Thelwall M ED - DO - DOI: 10.1007/s11192-008-0217-x PB - Springer Science and Business Media LLC VL - 74 IS - 2 SP - 273 EP - 294 Y2 - 2024/12/28 ER -