@proceedings{KSUn19,  
editor =       "Ralf Klamma and Marc Spaniol and Sayan Unankard",  
  title =      "Advances in Web-Based Learning",
  journal =    "Journal of Universal Computer Science",
  year =       "2019",
  volume =     "25",
  number =     "12",
  pages =      "1503--1665",
  date =       "2019-12-01",
  month =      "dec",
  note =       "\url|http://www.jucs.org/jucs_25_12"}