[1]
A. L. Krassmann, F. Herpich, M. Bercht, and S. C. Cazella, “Analyzing trends in academic papers about ubiquitous virtual worlds in education using text mining”, Int J Innov Educ Res, vol. 5, no. 4, pp. 167–180, Apr. 2017, doi: 10.31686/ijier.vol5.iss4.650.