1. Baumann H (2000): An Overview of environmental journals. Are there enough of them? AFR report 287, Swedish Environmental Protection Agency, Stockholm, Sweden
2. Garfield E (1996): The significant scientific literature appears in a small core of journals. The Scientist 10 (17)
3. Heinrich A (2001): WG: Int J LCA & ISI. Message to the Int J LCA editorial board. E-mail 24 October 2001
4. ISI (1999): Understanding the JCR(r): A Series; History of Citation Indexing, and The ISI Database: the journal selection process (http://www.isinet.com/hot/essays). accessed Aug 1999)
5. ISI (2001): The Impact Factor, and Research Fronts (http://www.isinet. com/hot/essays), accessed Sept 2001