References
- Adler , D. 1968 . Rev. mod. Phys. , 40 : 714
- Alexander , M. N. and Holcomb , D. F. 1968 . Rev. mod. Phys. , 40 : 815
- Anderson , P. W. 1961 . Phys. Rev. , 124 : 41
- Rado , G. A. and Suhl , H. , eds. 1963 . Magnetism Vol. 1 , 25
- Anzai , S. and Ozawa , K. 1968 . J. phys. Soc. Japan , 24 : 271
- Brinkman , W. F. and Rice , T. M. 1970 . Phys. Rev., B , 2 : 4302
- Fujime , S. , Murakami , M. and Hirahara , E. 1961 . J. phys. Soc. Japan , 16 : 183
- Heine , V. and Mattheiss , L. 1971 . submitted to J. Phys. C
- Hubbard , J. 1964 . Proc. R. Soc. A , 281 : 401
- Hulliger , F. 1968 . Structure and Bonding , 4 : 83
- Hulthén , L. and Laurikainen , K. V. 1951 . Rev. mod. Phys. , 23 : 1
- Kaplan , H. I. and Worrell , W. L. 1970 . The Chemistry of Extended Defects in Non-Metallic Solids , Edited by: LeRoy , Eyring and O'Keeffe , Michael . 561 North-Holland Publishing Co. .
- Marezio , O. 1971 . (to be published)
- Mott , N. F. 1961 . Phil. Mag. , 6 : 287
- 1969 . Phil. Mag. , 20 : 1
- Mott , N. F. and Davis , E. A. 1971 . Electronic Processes in Non-Crystalline Materials , Oxford : Clarendon Press .
- Mott , N. F. and Zinamon , Z. 1970 . Rep. Prog. Phys. , 33 : 881
- Ohtani , T. , Kosuge , K. and Kachi , S. 1970 . J. phys. Soc. Japan , 28 : 1588
- Paul , W. 1970 . Mater. Res. Bull. , 5 : 691
- Sparks , J. T. and Komoto , T. 1968 . Rev. mod. Phys. , 40 : 752
- Townsend , M. G. , Tremblay , R. , Horwood , J. L. and Ripley , L. J. 1971 . J. Phys. C (Solid St. Phys.) , 4 : 598
- Trahan , J. , Goodrich , R. G. and Watkins , S. F. 1970 . Phys. Rev. B , 2 : 2859
- Tyler , J. M. and Fry , J. L. 1970 . Phys. Rev. B , 1 : 4604