@article{ELMA_1984__39_141334,
     author = {Ulrich Abel},
     title = {A {Remark} on {Buffon's} {Needle} {Problem.}},
     journal = {Elemente der Mathematik},
     pages = {34--37},
     publisher = {mathdoc},
     volume = {39},
     year = {1984},
     zbl = {0536.60021},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1984__39_141334/}
}