1. F. Narin, K. Stevens, E. Whitlow, Scientific co-operation in Europe and the citation of multinationally-authored papers. Conference on Indicators of Output Evaluation of EC Research Programmes, Paris, 14–15 June 1990, pp xx-xx.
2. G. Lewison, P. Cunningham, The use of bibliometrics in the evaluation of Community biotechnology research programmes,Proceedings of First International Workshop on Science and Technology Indicators, Leiden, 14–16 November 1988. DSWO Press 1989, pp 99–114.
3. D.J. de S. Price, Measuring the size of science,Proc. Israel Academy of Scientific Humanities, Vol. 6, 1969, p. 10.
4. D.J. Frame, F. Narin, The international distribution of biomedical publications,Federation Proceedings, Vol. 36, No. 6, May 1977, pp 1790–95.