Espírito Santo, Alexandre do, and Richard D. Walker. “Measurement of Scientific Literature: A Review of Methods”. Semina: Ciências Exatas e Tecnológicas 2, no. 7 (December 15, 2004): 149–152. Accessed April 30, 2024. https://ojs.uel.br/revistas/uel/index.php/semexatas/article/view/5903.