GRUNWALD, Grzegorz - CIEĆKO, Adam - KRASUSKI, Kamil - KAŹMIERCZAK, Rafał. The GPS / EGNOS Positioning Quality in APV-1 and LPV-200 Flight Procedures. In Communications : Scientific Letters of the University of Zilina. - Žilina : EDIS, University Publishing House, University of Žilina, 2021. ISSN 1335-4205, 2021, vol. 23, no. 2, pp. E23-E34.