@unpublished{TUW-219249, author = {Huber, Katrin and Hinterberger, Fabian and Lesjak, Roman and Weber, Robert and Klug, Christian and Thaler, Gottfried}, title = {PPPserve - Network based GNSS phase biases to enhance PPP applications}, year = {2013}, note = {talk: The European Navigation Conference, Vienna, Austria; 2013-04-23 -- 2013-04-25} }