@article{AM2_1996__52_1-2_137653,
     author = {J.A. Lester},
     title = {Triangles {I:} {Shapes.}},
     journal = {Aequationes mathematicae},
     pages = {30--54},
     publisher = {mathdoc},
     volume = {52},
     number = {1-2},
     year = {1996},
     zbl = {0860.51009},
     url = {http://geodesic.mathdoc.fr/item/AM2_1996__52_1-2_137653/}
}