I. Tiryakioglu and  M. A. Ugur and  C. Ozkaymak,  Determination of Surface Deformations with Global Navigation Satellite System Time Series.   journal   = {International Journal of Geological and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2018, vol. 143(11). 734 - 737
    [viewed 07 March 2021]. Available from: https://publications.waset.org/pdf/10009830.