Bogolyubov NN, Prykarpatsky AK. Generalized de Rham-Hodge complexes, the related characteristic Chern classes, and some applications to integrable multidimensional differential systems on Riemannian manifolds. Ukr. Mat. Zhurn. [Internet]. 2007Mar.25 [cited 2024Apr.20];59(3):327–344. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3310