“…The importance of this research method is that it makes it possible to increase the knowledge already present in the literature and so to achieve an in-depth study through a careful, formalised, transparent and replicable research pattern (Tranfield et al , 2003; Booth et al , 2012; Hou and Neely, 2013; Fisch and Block, 2018). This method has been used by various authors in business and management (David and Han, 2004; Thorpe et al , 2005; Colicchia and Strozzi, 2012; Natalicchio et al , 2017; Laura Cordero and Ferreira, 2019), engineering (Budgen and Brereton, 2006), medicine (Trotti et al , 2003; Pihlainen et al , 2016), telecommunication (Dike and Rose, 2017) and banking (Lagasio, 2018) and corporate finance (Kumar and Goyal, 2015; Hoffmann et al , 2018; Farooq and Jibran, 2018; Dezi et al , 2018) field.…”