Kannappanavar, B. U., and M. Vijayakumar. “Periodical Literature of Plant and Cell Physiology: A Citation Analysis Study to Determine Obsolescence Factors and Patterns”. Journal of Information and Knowledge, vol. 38, no. 1, Mar. 2001, pp. 81-90, doi:10.17821/srels/2001/v38i1/48967.