@article{01428668,
title = {Simple counter examples for the unsolvability of the Fermat- and Steiner-Weber-problem by compass and ruler.},
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {41},
year = {2000},
pages = {151-158},
zbl = {0947.90094},
language = {en},
url = {http://dml.mathdoc.fr/item/01428668}
}
Mehlhos, St. Simple counter examples for the unsolvability of the Fermat- and Steiner-Weber-problem by compass and ruler.. Beiträge zur Algebra und Geometrie, Tome 41 (2000) pp. 151-158. http://gdmltest.u-ga.fr/item/01428668/