@inproceedings{TUW-264764, author = {Titov, Oleg and Girdiuk, Anastasiia}, title = {Effect of positional instabilities of the reference radio sources on estimation of the relativistic parameter {\&}{\#}947;}, booktitle = {IAU XXIX General Assembly Meeting Abstracts}, year = {2015}, pages = {26}, note = {talk: IAU XXIX General Assembly, Hawaii; 2015-08-03 -- 2015-08-14} }