Mordechai Ben-Ari Roman Bednarik Ronit Ben-Bassat Levy Gil Ebel Andrés Moreno Niko Myller Erkki Sutinen A decade of research and development on program animation: The Jeliot experience. 375-384 2011 22 J. Vis. Lang. Comput. 5 http://dx.doi.org/10.1016/j.jvlc.2011.04.004 db/journals/vlc/vlc22.html#Ben-AriBLEMMS11