TY - JOUR AU - Hirsch, J E TI - An index to quantify an individual's scientific research output JO - Proc Natl Acad Sci U S A IS - 46 VL - 102 PY - 2005 DO - 10.1073/pnas.0507655102 L3 - PubMed-ID: 16275915 SP - 16569 EP - 16572 ER -