Adenosine Sleep Theory in 1984.
• Josif Pančić discovered and identified the Serbian Spruce in 1875.
• Jovan Cvijić is considered the founder of geography in Serbia. In more than 30 years of intense scientific study, Cvijić published vast number of significant works, many of which have not lost value even today. He founded the Faculty of Philosophy's Geographical institute in 1923, the first geographic institute in Balkans
