@article{10_4153_CJM_1977_124_1,
     author = {Lester, J. A.},
     title = {Cone {Preserving} {Mappings} for {Quadratic} {Cones} {Over} {Arbitrary} {Fields}},
     journal = {Canadian journal of mathematics},
     pages = {1247--1253},
     year = {1977},
     volume = {29},
     number = {6},
     doi = {10.4153/CJM-1977-124-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-124-1/}
}