"ČNS IFPI" (in Czech). Hitparáda – Radio Top 100 Oficiální. IFPI Czech Republic. Note: Change the chart to CZ – RADIO – TOP 100 and insert 201141 into search. Retrieved June 3, 2015.
hitparadask.ifpicr.cz
"ČNS IFPI" (in Slovak). Hitparáda – Radio Top 100 Oficiálna. IFPI Czech Republic. Note: insert 201137 into search. Retrieved June 3, 2015.
"Media Forest – Weekly Charts. Media Forest. Retrieved September 27, 2011. Note: Romanian and international positions are rendered together by the number of plays before resulting an overall chart.