@article{JRAM_1975__0274_0275_151564,
     author = {Fritz Schweiger},
     title = {Eine kotangensalgorithmus\"ahnliche {Abbildung.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {90--93},
     year = {1975},
     volume = {0274_0275},
     zbl = {0305.10048},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1975__0274_0275_151564/}
}