https://www.bankofengland.co.uk/boeapps/database/FromShowColumns.asp?Travel=NIxAZxI1x&FromCategoryList=Yes&NewMeaningId=RSLVEX&CategId=6&HighlightCatValueDisplay=Exchange%20rate%20(spot)%20-%20Slovak%20koruna%20into%20US%20dollar
exchange rateslovak korunaus dollardata seriesspot
https://www.bde.es/wbe/en/noticias-eventos/actualidad-bce/notas-prensa-bce/concluye_el_per_ebc146e4dd20281.html
Dual circulation of Slovak koruna and euro comes to an end in Slovakia
dual circulationslovak korunaeurocomes