Amir, Naila, and Muneer Ahmad Rashid. “EIGENVALUES, EIGENVECTORS AND THE CONJUGACY CLASSES OF THE PSEUDO-ORTHOGONAL GROUPS O(n,m)”. VFAST Transactions on Mathematics, vol. 2, no. 1, Dec. 2014, pp. 13-24, doi:10.21015/vtm.v2i2.120.