1. Calais, J.-L. (1977) ‘Band structure of transition metal compounds’, Adv. Phys. 26, 847–885.
2. Neckel, A. (1983) ‘Recent investigations on the electronic structure of the fourth and fifth group transition metal monocarbides, mononitrides, and monoxides’, Int. J. Quantum Chem. 23, 1317–1353.
3. Schwarz, K. and Neckel, A. (1986) ‘Chemical bonding in refractory transition metal compounds’, in E. A. Almond, C. A. Brooks, and R. Warren (eds.), Proc. 2nd. Int. Conf. Hard Materials, Inst. Phys. Conf. Ser. No 75, 45–60.
4. Schwarz, K. (1987) ‘Band structure and chemical bonding in transition metal carbides and nitrides’, in CRC Critical Reviews in Solid State and Materials Science 13, issue 3, 211–257.
5. Slater, J. C. (1937) ‘Wave Functions in a Periodic Potential’, Phys. Rev. 51, 846–851.