@article{JRAM_1878__85_148371,
     author = {Karl Schering},
     title = {Zur {Theorie} des {Borchardtschen} arithmetisch-geometrischen {Mittels} aus vier {Elementen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {115--170},
     publisher = {mathdoc},
     volume = {85},
     year = {1878},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1878__85_148371/}
}