@article{10_4153_S0008439519000675,
     author = {Protas, David},
     title = {Derivatives of {Blaschke} {Products} and {Model} {Space} {Functions}},
     journal = {Canadian mathematical bulletin},
     pages = {716--725},
     year = {2020},
     volume = {63},
     number = {4},
     doi = {10.4153/S0008439519000675},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439519000675/}
}