@article{JDM_1923__32_145654,
     author = {S. Breuer},
     title = {Zur {Dreiecksgeometrie.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {119--132},
     publisher = {mathdoc},
     volume = {32},
     year = {1923},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JDM_1923__32_145654/}
}