Karbon, M., Heinkelmann, R., Mora-Diaz, J., Xu, M., Nilsson, T., & Schuh, H. (2017). The extension of the parametrization of the radio source coordinates in geodetic VLBI and its impact on the time series analysis. Journal of Geodesy, 91(7), 755-765. doi:10.1007/s00190-016-0954-1.