Grzegorz Grunwald, Adam Ciećko, Kamil Krasuski, & Rafał Kaźmierczak. (2021). The GPS / EGNOS Positioning Quality in APV-1 and LPV-200 flight procedures. Communications - Scientific Letters of the University of Zilina, 23(2), E23-E34. https://doi.org/10.26552/com.C.2021.2.E23-E34