Dombrovsky, R. F. On the geometry of tensor fields on manifolds with almost quaternion structure. (English. Russian original) Zbl 0908.53014 J. Math. Sci., New York 89, No. 3, 1301-1310 (1998); translation from Itogi Nauki Tekh., Ser. Sovrem Mat. Prilozh., Temat. Obz. 30, 205-219 (1996). Reviewer: A.Bucki (Oklahoma City) MSC: 53C15 PDFBibTeX XMLCite \textit{R. F. Dombrovsky}, J. Math. Sci., New York 89, No. 3, 1301--1310 (1998; Zbl 0908.53014); translation from Itogi Nauki Tekh., Ser. Sovrem Mat. Prilozh., Temat. Obz. 30, 205--219 (1996) Full Text: DOI
Bonan, Edmond Sur les G-structures de type quaternionien. (French) Zbl 0171.20802 Cah. Topol. Geom. Differ. 9, 389-463 (1967). PDFBibTeX XMLCite \textit{E. Bonan}, Cah. Topologie Géom. Différ. Catégoriques 9, 389--463 (1967; Zbl 0171.20802) Full Text: Numdam EuDML