@article{ELMA_1979__34_141223,
     author = {R.J. Stroeker},
     title = {Application of non-linear programming to plane geometry.},
     journal = {Elemente der Mathematik},
     pages = {1--7},
     publisher = {mathdoc},
     volume = {34},
     year = {1979},
     zbl = {0392.51016},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1979__34_141223/}
}