"ČNS IFPI" (in Czech). Hitparáda – Radio Top 100 Oficiální. IFPI Czech Republic. Note: Select 50. týden 2021 in the date selector. Retrieved 20 December 2021.
"ČNS IFPI" (in Czech). Hitparáda – Digital Top 100 Oficiální. IFPI Czech Republic. Note: Select 40. týden 2021 in the date selector. Retrieved 11 October 2021.
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