@article{JRAM_1965__219_150688,
     author = {A. Sharma and E. Frank},
     title = {Continued fraction expansions and iterations of {Newton's} formula.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {62--66},
     year = {1965},
     volume = {219},
     zbl = {0142.12503},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1965__219_150688/}
}