Banaru, M. “ON THE GRAY-HERVELLA CLASSES OF AH-STRUCTURES ON SIX-DIMENSIONAL SUBMANIFOLDS OF CAYLEY ALGEBRA”. Ann. Sofia Univ. Fac. Math. and Inf. 95 (December 12, 2003): 125–131. Accessed November 22, 2024. https://annual.uni-sofia.bg/index.php/fmi/article/view/182.