a negative trendp < 0.01
However, a negative trend towards an increased citation density with increasing time since publication was found to be significant ( r =–0.545, p < 0.01) as shown in Fig. 2 .
However, a negative trend towards an increased citation density with increasing time since publication was found to be significant ( r =–0.545, p < 0.01) as shown in Fig. 2 .
The impact factors of journals ranged from 0.784 ( Pan American Journal of Public Health ) to 53.254 ( The Lancet ). Table 2 summarizes the complete list of all journals. A significant trend ( p < 0.05) occurred between a specific journal age and the quantity of “classics” published in that journal ( r = 0.321).