Richard L. M. Synge 25 Years of Science Citation Index - some experiences. 33-35 1990 30 Journal of Chemical Information and Computer Sciences 1 http://pubs.acs.org/cgi-bin/archive.cgi/jcisd8/1990/30/i01/f-pdf/f_ci00065a009.pdf db/journals/jcisd/jcisd30.html#Synge90