@article{hayal_sanli_2016,  title={REVISITING THE ROLE OF OBSERVATION SESSION DURATION ON PRECISE POINT POSITIONING ACCURACY USING GIPSY/OASIS II SOFTWARE},  volume={22},  ISSN={1982-2170},  url={https://doi.org/10.1590/S1982-21702016000300023},  DOI={10.1590/S1982-21702016000300023},  number={3},  journal={Boletim de Ciências Geodésicas},  publisher={Universidade Federal do Paraná},  author={Hayal, Adem G. and Sanli, D. Ugur},  year={2016},  month={Jul},  pages={405–419} }