Mkrttchian, Vardan Avatar-Based Models, Tools, and Innovation in the Digital Economy / Vardan Mkrttchian (editor), Leyla Gamidullaeva (editor) & Ekaterina Aleshina (editor) - 1st edition - New delhi : IGI Global , 2019 ISBN: 9781799811053 Dewey Class. No.: 658.800285 / AVA