@article{10_4153_CJM_1970_038_7,
     author = {Berg, I. D.},
     title = {Extensions of {Certain} {Maps} to {Automorphisms} of m},
     journal = {Canadian journal of mathematics},
     pages = {308--316},
     year = {1970},
     volume = {22},
     number = {2},
     doi = {10.4153/CJM-1970-038-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-038-7/}
}