@misc{ELMA_1989__44_3_141470,
     title = {A note on {L'H\^opital's} rule.},
     journal = {Elemente der Mathematik},
     pages = {150--153},
     publisher = {mathdoc},
     volume = {44},
     number = {3},
     year = {1989},
     zbl = {0702.26004},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1989__44_3_141470/}
}