@unpublished{TUW-180691, author = {Hobiger, Thomas and B{\"o}hm, Johannes and Koyama, Yasuhiro and Kondo, Tetsuro and Ichikawa, Ryuichi}, title = {Proper treatment of VLBI reference station clock-offsets and their effect on UT1 estimates}, year = {2009}, note = {poster presentation: Meeting of the Geodetic Society of Japan, Tsukuba, Japan; 2009-11-04 -- 2009-11-06} }