<ul><li><a href=https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=WDU20021301112 target=_blank>Aviation Law(Ustawa Prawo lotnicze, Dz.U. 2002 Nr 130 poz. 1112, implementing Directive 2002/30/EC, 3 July 2002, last updated on 23 April 2022, article 69)</a></li><li><a href=https://www.lotnisko-chopina.pl/en/departures.html target=_blank>Flight schedule for the Warsaw Chopin airport</a></li><li><a href=https://www.lotnisko-chopina.pl/ target=_blank>Core Night - Warsaw Chopin Airport</a></li></ul>