@article{TM2_2016_XIX_2_a0,
     author = {Joachim T. Haug and Carolin Haug},
     title = {Der {Zusammenhang} zwischen {Ordnungsgraden} und {Kongruenzs\"atzen} am {Beispiel} des {Systems} der {Dreiecke}},
     journal = {The Teaching of Mathematics},
     pages = {57 },
     publisher = {mathdoc},
     volume = {XIX},
     number = {2},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM2_2016_XIX_2_a0/}
}