@article{10_4064_aa_81_3_229_245,
     author = {Roy Maltby},
     title = {Root systems and the {Erd\H{o}s-Szekeres} {Problem}},
     journal = {Acta Arithmetica},
     pages = {229--245},
     publisher = {mathdoc},
     volume = {81},
     number = {3},
     year = {1997},
     doi = {10.4064/aa-81-3-229-245},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-81-3-229-245/}
}