TY - JOUR T1 - Web indicators for research evaluation. Part 2: Social media metrics JO - Profesional de la Informacion PY - 2015/09/24 AU - Thelwall M AU - Kousha K ED - DO - DOI: 10.3145/epi.2015.sep.09 VL - 24 IS - 5 SP - 607 EP - 620 Y2 - 2025/03/10 ER -