Stojan Protić (Serbian Cyrillic: Стојан Протић; 28 January 1857 – 28 October 1923) was a Serbian politician and writer. He served as the prime minister of the Kingdom of Serbs, Croats, and Slovenes between 1918 and 1919, and again in 1920, later called Yugoslavia. He is best remembered as the key theoretician of Serbian parliamentarism. Source: Wikipedia (en)