@article{1178225298,
author = {Muk\=oyama, Kazuo},
title = {Smooth ${\rm Sp}(2,{\bf R})$-actions on the $4$-sphere},
journal = {Tohoku Math. J. (2)},
volume = {48},
number = {4},
year = {1996},
pages = { 543-560},
language = {en},
url = {http://dml.mathdoc.fr/item/1178225298}
}
Mukōyama, Kazuo. Smooth ${\rm Sp}(2,{\bf R})$-actions on the $4$-sphere. Tohoku Math. J. (2), Tome 48 (1996) no. 4, pp. 543-560. http://gdmltest.u-ga.fr/item/1178225298/