“…The relational approach has four main techniques: co‐citation, bibliographic coupling, co‐authorship, and co‐word analysis (Zupic & Čater, ). This approach has been employed to help develop theory in many different disciplines, such as operations management (Pilkington & Fitzgerald, ), services management (Pilkington & Chai, ), human resources management (Fernandez‐Alles & Ramos‐Rodríguez, ), and strategic management (Koseoglu, , ; Nerur et al, ; Ramos‐Rodríguez & Ruíz‐Navarro, ).…”