@article{NUMA_1980__35_186292,
     author = {K. Ritter},
     title = {On the {Rate} of {Superlinear} {Convergence} of a {Class} of {Variable} {Metric} {Methods.}},
     journal = {Numerische Mathematik},
     pages = {293--314},
     publisher = {mathdoc},
     volume = {35},
     year = {1980},
     zbl = {0459.65043},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1980__35_186292/}
}