TY - CONF T1 - Games with a purpose or mechanised labour? A comparative study JO - ACM International Conference Proceeding Series PY - 2013/01/01 AU - Sabou M AU - Bontcheva K AU - Scharl A AU - Föls M ED - DO - DOI: 10.1145/2494188.2494210 SN - 9781450323000 Y2 - 2024/12/23 ER -