@article{ELMA_1978__33_141220,
     author = {F. Streit},
     title = {On a statistical approach to {Bertrand's} problem.},
     journal = {Elemente der Mathematik},
     pages = {134--137},
     publisher = {mathdoc},
     volume = {33},
     year = {1978},
     zbl = {0395.62020},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1978__33_141220/}
}