@article{10_4064_sm_39_1_1_15,
     author = {Jochen Reinermann},
     title = {Approximation von {Fixpunkten}},
     journal = {Studia Mathematica},
     pages = {1--15},
     year = {1971},
     volume = {39},
     number = {1},
     doi = {10.4064/sm-39-1-1-15},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-39-1-1-15/}
}