@misc{Leoncavallo_Ruggero_(1857-1919)_I, author={Leoncavallo, Ruggero (1857-1919)}, howpublished={online}, publisher={Gebethner i Wolff}, language={ita}, language={pol}, title={I pagliacci : dramma in due atti. No 4, Serenata, per canto}, type={druk muzyczny}, keywords={opery 19 w.}, }