Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Usha Gupta. Obsolescence of physics literature: Exponential decrease of the density of citations to Physical Review articles with age. JASIS, 41(4):282-287, 1990.
Abstract is missing.