Sousa, Sérgio Filipe; Pedro Alexandrino Fernandes; Maria João Ramos (25 de agosto de 2007). «General Performance of Density Functionals». The Journal of Physical Chemistry111 (42): 10439-10452. Bibcode:2007JPCA..11110439S. PMID17718548. doi:10.1021/jp0734474.
Janesko, Benjamin G. (26 de junio de 2012). «Rung 3.5 Density Functionals: Another Step on Jacob's Ladder». International Journal of Quantum Chemistry113 (2): 83-88. doi:10.1002/qua.24256.
Casida, Mark E. (14 de agosto de 2012). «Jacob's Ladder for Time-Dependent Density-Functional Theory: Some Rungs on the Way to Photochemical Heaven». Low-Lying Potential Energy Surfaces. ACS Symposium Series 828. American Chemical Society. pp. Chapter 9, pp 199-220. ISBN978-0-8412-3792-6. doi:10.1021/bk-2002-0828.ch009.
harvard.edu
adsabs.harvard.edu
Sousa, Sérgio Filipe; Pedro Alexandrino Fernandes; Maria João Ramos (25 de agosto de 2007). «General Performance of Density Functionals». The Journal of Physical Chemistry111 (42): 10439-10452. Bibcode:2007JPCA..11110439S. PMID17718548. doi:10.1021/jp0734474.
iaqms.org
«John P. Perdew». International Academy of Quantum Molecular Science. Consultado el 23 de marzo de 2014.
Sousa, Sérgio Filipe; Pedro Alexandrino Fernandes; Maria João Ramos (25 de agosto de 2007). «General Performance of Density Functionals». The Journal of Physical Chemistry111 (42): 10439-10452. Bibcode:2007JPCA..11110439S. PMID17718548. doi:10.1021/jp0734474.