“…The analysis of scientific publications constitutes a fundamental link in the research process and therefore it has become a tool that allows to evaluate the generation, evolution and impact of knowledge in the environment (Rueda-Clausen, Villa-Roel and Rueda-Clausen, 2005; Escorcia, 2008) providing a macroscopic overview of large amounts of academic literature (van Nunen, Li, Reniers & Ponnet, 2007). This activity has been called bibliometrics, which is a part of scientometrics, it is multidisciplinary and is defined as the application of mathematical and statistical methods to analyze the nature and course of scientific publications (Merigó, 2016;Campos, 2007), it can reveal the latest advances, research directions and main topics in a particular field of research (Wang, Pan, Ke, Wang & Wei, 2014), as well as the identification of current gaps in a given research discipline, both in terms of content and geographically (Gall, Nguyen & Cutter, 2015), which allows researchers to orient future lines of research towards specific fields (Bayoumy, Dargham and Arayssi, 2016). Nowadays, a large number of bibliometric studies are carried out (Soosaraei, Akbar, Fakhar & Ziaei, 2018).…”