@article{10_4064_sm_57_3_217_228,
     author = {Manfred Stoll and James Roberts},
     title = {Composition operators on $F^{+}$},
     journal = {Studia Mathematica},
     pages = {217--228},
     publisher = {mathdoc},
     volume = {57},
     number = {3},
     year = {1976},
     doi = {10.4064/sm-57-3-217-228},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-57-3-217-228/}
}