@article{CMUC_1975_16_4_a7,
     author = {Pt\'ak, Vlastimil},
     title = {Concerning the rate of convergence of {Newton's} process},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {699--705},
     year = {1975},
     volume = {16},
     number = {4},
     mrnumber = {0398092},
     zbl = {0314.65023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1975_16_4_a7/}
}