@article{JDM_1920__29_145587,
     author = {Siegbert Wiesner},
     title = {Zur {Biographie} {Johann} {Bolyais.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {130--135},
     publisher = {mathdoc},
     volume = {29},
     year = {1920},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JDM_1920__29_145587/}
}