MINCHEV, I. The Biquard connection on Riemannian quaternionic contact manifolds. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 98, p. 157–170, 2008. Disponível em: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/135. Acesso em: 22 nov. 2024.