@article{AM2_1994__48_2-3_137607,
     author = {Klaus Ritter},
     title = {Average errors for zero finding: lower bounds for smooth or monotone functions.},
     journal = {Aequationes mathematicae},
     pages = {194--219},
     publisher = {mathdoc},
     volume = {48},
     number = {2-3},
     year = {1994},
     zbl = {0809.65044},
     url = {http://geodesic.mathdoc.fr/item/AM2_1994__48_2-3_137607/}
}