@article{MZ_1977__156_172577,
     author = {Gerhard Schmeisser},
     title = {On {Ilieff's} {Conjecture.}},
     journal = {Mathematische Zeitschrift},
     pages = {165--174},
     year = {1977},
     volume = {156},
     zbl = {0346.30004},
     url = {http://geodesic.mathdoc.fr/item/MZ_1977__156_172577/}
}