Summary from Wikipedia

Jovanović worked as a physician; he wrote in many poetry genres, including love, lyric, patriotic, political, and youth, but he remains best known for his children's poetry. His nursery rhymes have entered the Serbian national consciousness and people sing them to their children without knowing who wrote them. Jovanović also translated the works of some of the great poets, such as Russians Lermontov and Pushkin, Germans Goethe and Heine, and the American Longfellow.