1. K.M. Pesyna, R.W. Heath, T.E. Humphreys, Centimeter positioning with a Smartphone-quality GNSS zntenna, en: ION GNSS Conf., Tampa, FL, 2014.
2. High-sensivity GPS – an availability, reliability and accuracy test;Schwieger;Bull. Sci. Geogr.,2009
3. The use of low-cost, single-frequency GNSS receivers in mapping surveys;Tsakiri;Surv. Rev.,2016
4. Weighting of multi-GNSS observations in real-time precise point positioning;Kazmierski;Remote Sens.,2018
5. A. Sioulis, M. Tsakiri, D. Stathas, Evaluation of low cost , high sensitivity GNSS receivers based on the ISO RTK standards, 6 (2015) 1597–1606.