@article{1029000212,
author = {Gray, Alfred},
title = {A note on manifolds whose holonomy group is a subgroup of ${\rm Sp}(n)\cdot {\rm Sp}(1)$.},
journal = {Michigan Math. J.},
volume = {16},
number = {1},
year = {1969},
pages = { 125-128},
language = {en},
url = {http://dml.mathdoc.fr/item/1029000212}
}
Gray, Alfred. A note on manifolds whose holonomy group is a subgroup of ${\rm Sp}(n)\cdot {\rm Sp}(1)$.. Michigan Math. J., Tome 16 (1969) no. 1, pp. 125-128. http://gdmltest.u-ga.fr/item/1029000212/