@article{10_4153_CMB_1982_003_6,
     author = {Campbell, L. L.},
     title = {Existence of {Solutions} of an {Ill-Posed} {Problem} for the {Vibrating} {String}},
     journal = {Canadian mathematical bulletin},
     pages = {29--36},
     year = {1982},
     volume = {25},
     number = {1},
     doi = {10.4153/CMB-1982-003-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1982-003-6/}
}