Xiao, H., O.T. Bruhns, and A. Meyers. 1998. “On Symmetric Tensor-Valued Isotropic Functions of a Symmetric Tensor and a Skewsymmetric Tensor and Related Transversely Isotropic Functions”. Archives of Mechanics 50 (4): 731-41. https://am.ippt.pan.pl/index.php/am/article/view/v50p731.