Augustyn, Adam; C. Shepherd, Melinda; Chauhan, Yamini; Levy, Michael; Lotha, Gloria; Tikkanen, Amy (19 November 2020). "European Championship". Encyclopædia Britannica. Archived from the original on 29 June 2021. Retrieved 10 July 2021.
Stokkermans, Karel; Henrique Jarreta, Sergio (13 January 2011). "World Cup 1990 Qualifying". RSSSF. Archived from the original on 14 October 2012. Retrieved 1 August 2021.
Augustyn, Adam; C. Shepherd, Melinda; Chauhan, Yamini; Levy, Michael; Lotha, Gloria; Tikkanen, Amy (19 November 2020). "European Championship". Encyclopædia Britannica. Archived from the original on 29 June 2021. Retrieved 10 July 2021.
Stokkermans, Karel; Henrique Jarreta, Sergio (13 January 2011). "World Cup 1990 Qualifying". RSSSF. Archived from the original on 14 October 2012. Retrieved 1 August 2021.