“…It is well known that the cumulative number L(t) of various items (e.g., articles, journals and authors) in a database or citations of the publication output of an author initially increases rapidly with time, followed by a maximum level attained after a certain time, exhibiting an S-shaped curve (Avramescu, 1979;Bharathi, 2011;Egghe, Ravichandra Rao, & Rousseau, 1995;Gupta, 1990;Liu & Rousseau, 2014;Price, 1963;Sangwal, 2011aSangwal, , 2012a. Various models have been developed and applied over years to describe this growth behavior of items (Price, 1963;Egghe & Ravichandra Rao, 1992;Sangwal, 2011aSangwal, , 2012bWong & Goh, 2010).…”