@article{10_1017_S001708950000152X,
     author = {Wood, G. R. and Yamamuro, Sadayuki},
     title = {On the semigroup of differentiable mappings {(II)}},
     journal = {Glasgow mathematical journal},
     pages = {122--128},
     year = {1972},
     volume = {13},
     number = {2},
     doi = {10.1017/S001708950000152X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950000152X/}
}