Jens Grubert Daniel Hamacher Rüdiger Mecke Irina Böckelmann Lutz Schega Anke Huckauf Mario H. Urbina Michael Schenk Fabian Doil Johannes Tümler Extended investigations of user-related issues in mobile industrial AR. 229-230 2010 ISMAR http://dx.doi.org/10.1109/ISMAR.2010.5643581 conf/ismar/2010 db/conf/ismar/ismar2010.html#GrubertHMBSHUSDT10