@article{10_4064_ap83_1_10,
     author = {Karl-Joachim Wirths},
     title = {A proof of the {Livingston} conjecture for the fourth
 and the fifth coefficient of concave univalent functions},
     journal = {Annales Polonici Mathematici},
     pages = {87--93},
     publisher = {mathdoc},
     volume = {83},
     number = {1},
     year = {2004},
     doi = {10.4064/ap83-1-10},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap83-1-10/}
}