This excellent two page article is available free of charge at http://www.ias.ac.in/currsci/nov252003/1391.pdf The author refers to a short piece I published in 1994 about “Research Fronts”. This appeared in Current Contents under the rubric “Citation Comments”. Since the print version of Current Contents is generally not available the full text can be found at: http://www.isinet.com/essays/citationanalysis/11.html/