¹Department of Library and Information Science, School of Library and Information Science, University of Granada, 18071 Granada, Spain

²Former director, National Commission for the Evaluation of Research Activity (CNEAI), Department of Biocatalysis, Institute of Catalysis, CSIC, 28049 Madrid, Spain

DOI: 10.1038/417898b

PubMed: 12087380

WoS: 000176441200017