@article{MM2_1986__56_155164,
     author = {Rolf J\"ager},
     title = {Charakterisierung des {Cotangens} mit {Replikativit\"at.}},
     journal = {Manuscripta mathematica},
     pages = {167--176},
     publisher = {mathdoc},
     volume = {56},
     year = {1986},
     zbl = {0589.39008},
     url = {http://geodesic.mathdoc.fr/item/MM2_1986__56_155164/}
}