+
+@Article{kresse96,
+ title = "Efficiency of ab-initio total energy calculations for
+ metals and semiconductors using a plane-wave basis
+ set",
+ journal = "Computational Materials Science",
+ volume = "6",
+ number = "1",
+ pages = "15--50",
+ year = "1996",
+ note = "",
+ ISSN = "0927-0256",
+ doi = "DOI: 10.1016/0927-0256(96)00008-0",
+ URL = "http://www.sciencedirect.com/science/article/B6TWM-3VRVTBF-3/2/88689b1eacfe2b5fe57f09d37eff3b74",
+ author = "G. Kresse and J. Furthmüller",
+ notes = "vasp ref",
+}
+
+@Article{bloechl94,
+ title = "Projector augmented-wave method",
+ author = "P. E. Bl{\"o}chl",
+ journal = "Phys. Rev. B",
+ volume = "50",
+ number = "24",
+ pages = "17953--17979",
+ numpages = "26",
+ year = "1994",
+ month = dec,
+ doi = "10.1103/PhysRevB.50.17953",
+ publisher = "American Physical Society",
+ notes = "paw method",
+}
+
+@Article{hamann79,
+ title = "Norm-Conserving Pseudopotentials",
+ author = "D. R. Hamann and M. Schl{\"u}ter and C. Chiang",
+ journal = "Phys. Rev. Lett.",
+ volume = "43",
+ number = "20",
+ pages = "1494--1497",
+ numpages = "3",
+ year = "1979",
+ month = nov,
+ doi = "10.1103/PhysRevLett.43.1494",
+ publisher = "American Physical Society",
+ notes = "norm-conserving pseudopotentials",
+}
+
+@Article{vanderbilt90,
+ title = "Soft self-consistent pseudopotentials in a generalized
+ eigenvalue formalism",
+ author = "David Vanderbilt",
+ journal = "Phys. Rev. B",
+ volume = "41",
+ number = "11",
+ pages = "7892--7895",
+ numpages = "3",
+ year = "1990",
+ month = apr,
+ doi = "10.1103/PhysRevB.41.7892",
+ publisher = "American Physical Society",
+ notes = "vasp pseudopotentials",
+}
+
+@Article{perdew86,
+ title = "Accurate and simple density functional for the
+ electronic exchange energy: Generalized gradient
+ approximation",
+ author = "John P. Perdew and Wang Yue",
+ journal = "Phys. Rev. B",
+ volume = "33",
+ number = "12",
+ pages = "8800--8802",
+ numpages = "2",
+ year = "1986",
+ month = jun,
+ doi = "10.1103/PhysRevB.33.8800",
+ publisher = "American Physical Society",
+ notes = "rapid communication gga",
+}
+
+@Article{perdew02,
+ title = "Generalized gradient approximations for exchange and
+ correlation: {A} look backward and forward",
+ journal = "Physica B: Condensed Matter",
+ volume = "172",
+ number = "1-2",
+ pages = "1--6",
+ year = "1991",
+ note = "",
+ ISSN = "0921-4526",
+ doi = "DOI: 10.1016/0921-4526(91)90409-8",
+ URL = "http://www.sciencedirect.com/science/article/B6TVH-46G8GR9-3D/2/18e610a616e4d80b934079c89063ece7",
+ author = "John P. Perdew",
+ notes = "gga overview",
+}
+
+@Article{perdew92,
+ title = "Atoms, molecules, solids, and surfaces: Applications
+ of the generalized gradient approximation for exchange
+ and correlation",
+ author = "John P. Perdew and J. A. Chevary and S. H. Vosko and
+ Koblar A. Jackson and Mark R. Pederson and D. J. Singh
+ and Carlos Fiolhais",
+ journal = "Phys. Rev. B",
+ volume = "46",
+ number = "11",
+ pages = "6671--6687",
+ numpages = "16",
+ year = "1992",
+ month = sep,
+ doi = "10.1103/PhysRevB.46.6671",
+ publisher = "American Physical Society",
+ notes = "gga pw91 (as in vasp)",
+}