@article{ELMA_1960__15_140711,
     author = {A. Aigner},
     title = {Bemerkung und {L\"osung} zum {Problem} {Nr.} 29.},
     journal = {Elemente der Mathematik},
     pages = {66--67},
     publisher = {mathdoc},
     volume = {15},
     year = {1960},
     zbl = {0093.25801},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1960__15_140711/}
}