@article{PA_2018_7_1_a5,
     author = {Saminathan Ponnusamy and Karl-Joachim Wirths},
     title = {Coefficient problems on the class $U(\lambda)$},
     journal = {Problemy analiza},
     pages = {87--103},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PA_2018_7_1_a5/}
}