TY - JOUR TI - Generalized Gradient Approximation Made Simple [Phys. Rev. Lett. 77, 3865 (1996)] AU - Perdew, John P AU - Burke, Kieron AU - Ernzerhof, Matthias T2 - Physical Review Letters DA - 1997/02// PY - 1997 DO - 10.1103/PhysRevLett.78.1396 VL - 78 IS - 7 SP - 1396 EP - 1396 UR - https://link.aps.org/doi/10.1103/PhysRevLett.78.1396 ER - TY - JOUR TI - Generalized Gradient Approximation Made Simple AU - Perdew, John P. AU - Burke, Kieron AU - Ernzerhof, Matthias T2 - Phys. Rev. Lett. DA - 1996/10// PY - 1996 DO - 10.1103/PhysRevLett.77.3865 VL - 77 IS - 18 SP - 3865 EP - 3868 UR - https://link.aps.org/doi/10.1103/PhysRevLett.77.3865 ER -