1. Preliminary sketch of bi-quaternions;Clifford,1873
2. Theorem in kinematics;Leudesdorf;The Messenger of Mathematics,1877
3. Theorem in kinematics;Leudesdorf;The Messenger of Mathematics,1877
4. A theorem in areas including Holditch's, with its analogue in three dimensions;Elliott;The Messenger of Mathematics,1878
5. A theorem in areas including Holditch's, with its analogue in three dimensions;Elliott;The Messenger of Mathematics,1881