Citation: Anderson, J.S.; Bevan, D.J.M.; Hutchinson, J.L.; Cheetham, A.K.; von Dreele, R.B.; Straehle, J. (1975). The structure of germanium niobium oxide, an inherently non-stoichiometric block structure. Proceedings of the Royal Society of London, Series A: Mathematical and Physical Sciences (76,1906-), 346, pp. 139-156.