"ČNS IFPI" (به چکی). Hitparáda – Radio Top 100 Oficiální. IFPI Czech Republic. Note: Change the chart to CZ – RADIO – TOP 100 and insert 200638 into search. Retrieved May 14, 2013.
hitparadask.ifpicr.cz
"ČNS IFPI" (به اسلواکی). Hitparáda – Radio Top 100 Oficiálna. IFPI Czech Republic. Note: insert 200641 into search. Retrieved May 14, 2013.