D. R. Hamann, 1979, Phys. Rev. Lett., 43, 1494, 10.1103/PhysRevLett.43.1494
G. Kerker, 1980, J. Phys. C, 13, L189, 10.1088/0022-3719/13/9/004
A. Zunger, 1978, Phys. Rev. B, 18, 5449, 10.1103/PhysRevB.18.5449
A. Zunger, 1979, Phys. Rev. B, 20, 4082, 10.1103/PhysRevB.20.4082
W. E. Pickett, 1989, Comput. Phys. Rep., 9, 115, 10.1016/0167-7977(89)90002-6
D. Vanderbilt, 1985, Phys. Rev. B, 32, 8412, 10.1103/PhysRevB.32.8412
A. M. Rappe, 1990, Phys. Rev. B, 41, 1227, 10.1103/PhysRevB.41.1227
R. Car, 1985, Phys. Rev. Lett., 55, 2471, 10.1103/PhysRevLett.55.2471
R. Natarajan, 1989, J. Comput. Phys., 82, 218, 10.1016/0021-9991(89)90043-0
I. Štich, 1989, Phys. Rev. B, 39, 4997, 10.1103/PhysRevB.39.4997
X. Gonze, 1989, J. Phys. Condens. Matter, 1, 525, 10.1088/0953-8984/1/3/004
L. Kleinman, 1982, Phys. Rev. Lett., 48, 1425, 10.1103/PhysRevLett.48.1425
D. R. Hamann, 1989, Phys. Rev. B, 40, 2980, 10.1103/PhysRevB.40.2980
E. L. Shirley, 1989, Phys. Rev. B, 40, 3652, 10.1103/PhysRevB.40.3652
J. C. Phillips, 1959, Phys. Rev., 116, 287, 10.1103/PhysRev.116.287
S. G. Louie, 1982, Phys. Rev. B, 26, 1738, 10.1103/PhysRevB.26.1738
G. B. Bachelet, 1982, Phys. Rev. B, 26, 4199, 10.1103/PhysRevB.26.4199