"ČNS IFPI" (чешск.). Hitparáda – Digital Top 100 Oficiální. IFPI Czech Republic. Note: Change the chart to CZ – SINGLES DIGITAL – TOP 100 and insert 201615 into search. Проверено 2016-10-18.
hitparadask.ifpicr.cz
"ČNS IFPI" (in Slovak). Hitparáda – Singles Digital Top 100 Oficiálna. IFPI Czech Republic. Note: Select SINGLES DIGITAL - TOP 100 and insert 201614 into search. Проверено 2016-10-18.