@inproceedings{henrik1998hypercomplex,
title={Hypercomplex structures associated to quaternionic manifolds},
author={Henrik Pedersen, Yat Sun Poon, and AF Swann},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020220531794052326},
booktitle={Differential Geometry and its Applications},
volume={9},
number={3},
pages={273-292},
year={1998},
}
Henrik Pedersen, Yat Sun Poon, and AF Swann. Hypercomplex structures associated to quaternionic manifolds. 1998. Vol. 9. In Differential Geometry and its Applications. pp.273-292. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020220531794052326.