Learning analytics in European higher education - Trends and barriers. - Yi-Shan Tsai; Diego Rates; Pedro Manuel Moreno-Marcos; Pedro J. Muñoz-Merino; Ioana Jivet; Maren Scheffel; Hendrik Drachsler; Carlos Delgado Kloos; Dragan Gasevic (Comput. Educ., 2020)