@unpublished{TUW-219241, author = {Pradipta, Dhota and Weber, Robert and Wieser, Andreas and Wijaya, Dudy Darmawan}, title = {A preliminary study of multi-GNSS data combination}, year = {2013}, note = {poster presentation: The European Navigation Conference, Vienna, Austria; 2013-04-23 -- 2013-04-25} }