Editors of Encyclopædia Britannica. Dragutin Dimitrijevic. Encyclopædia Britannica Online. Diakses tanggal 8 September 2016.Pemeliharaan CS1: Teks tambahan: authors list (link)
Editors of Encyclopædia Britannica. Alexander. Encyclopædia Britannica Online. Diakses tanggal 8 September 2016.Pemeliharaan CS1: Teks tambahan: authors list (link)
Thomas M. Poulsen; John R. Lampe; John B. Allcock. Serbia. Encyclopædia Britannica Online. Diakses tanggal 8 September 2016.
Thomas M. Poulsen; John R. Lampe; John B. Allcock. Serbia. Encyclopædia Britannica Online. Diakses tanggal 8 September 2016.