@article{CMH_1977__52_139707,
     author = {Stephan Ruscheweyh},
     title = {Linear operators between classes of prestarlike functions.},
     journal = {Commentarii mathematici Helvetici},
     pages = {497--510},
     publisher = {mathdoc},
     volume = {52},
     year = {1977},
     zbl = {0372.30007},
     url = {http://geodesic.mathdoc.fr/item/CMH_1977__52_139707/}
}