@article{10_4153_CJM_1984_052_2,
     author = {Hughes, Rhonda J.},
     title = {On {Unbounded} {Volterra} {Operators}},
     journal = {Canadian journal of mathematics},
     pages = {914--923},
     year = {1984},
     volume = {36},
     number = {5},
     doi = {10.4153/CJM-1984-052-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1984-052-2/}
}