Eidhoff, A. , Stief, S. , Voeth, M. , Gundlach, S. (2016). 'Drivers of Digital Product Innovation in Firms: An Empirical Study of Technological, Organizational, and Environmental Factors'. World Academy of Science, Engineering and Technology, Open Science Index 114, International Journal of Economics and Management Engineering, 10(6), 1888 - 1892.