@article{10_4064_sm_35_3_311_321,
     author = {Henry Helson},
     title = {The differential equation of an inner function},
     journal = {Studia Mathematica},
     pages = {311--321},
     publisher = {mathdoc},
     volume = {35},
     number = {3},
     year = {1970},
     doi = {10.4064/sm-35-3-311-321},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-35-3-311-321/}
}