@misc{10_4153_CMB_1975_036_1,
     title = {On the {Existence} and {Uniqueness} of {Solutions} of the {Equation}},
     journal = {Canadian mathematical bulletin},
     pages = {181--187},
     year = {1975},
     volume = {18},
     number = {2},
     doi = {10.4153/CMB-1975-036-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1975-036-1/}
}