@article{10_1017_S0017089500000100,
     author = {Jr, Kenneth D. Magill},
     title = {Automorphisms of the semigroup of all differentiable functions},
     journal = {Glasgow mathematical journal},
     pages = {63--66},
     year = {1967},
     volume = {8},
     number = {1},
     doi = {10.1017/S0017089500000100},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500000100/}
}