@article{10_4153_CJM_1970_053_3,
     author = {Mizel, Victor J.},
     title = {Characterization of {Non-Linear} {Transformations} {Possessing} {Kernels}},
     journal = {Canadian journal of mathematics},
     pages = {449--471},
     year = {1970},
     volume = {22},
     number = {3},
     doi = {10.4153/CJM-1970-053-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-053-3/}
}