@article{ELMA_1977__32_141204,
     author = {Saly Ruth Struik},
     title = {Fl\"achengleichheit und {Cavalierische} {Gleichheit} von {Dreiecken.}},
     journal = {Elemente der Mathematik},
     pages = {137--143},
     publisher = {mathdoc},
     volume = {32},
     year = {1977},
     zbl = {0367.50004},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1977__32_141204/}
}