@article{MZ_1984__186_173447,
     author = {Glenn Schober and John K. Williams},
     title = {On {Coefficient} {Estimates} and {Conjectures} for the {Class} ... .},
     journal = {Mathematische Zeitschrift},
     pages = {309--320},
     publisher = {mathdoc},
     volume = {186},
     year = {1984},
     zbl = {0549.30011},
     url = {http://geodesic.mathdoc.fr/item/MZ_1984__186_173447/}
}