Helander, M. G.; Greiner, M. T.; Wang, Z. B.; Lu, Z. H. (2010). "Pitfalls in measuring work function using photoelectron spectroscopy". Applied Surface Science. 256 (8): 2602. Bibcode:2010ApSS..256.2602H. doi:10.1016/j.apsusc.2009.11.002.
Nikolic, M. V.; Radic, S. M.; Minic, V.; Ristic, M. M. (February 1996). "The dependence of the work function of rare earth metals on their electron structure". Microelectronics Journal. 27 (1): 93–96. doi:10.1016/0026-2692(95)00097-6. ISSN0026-2692.
Helander, M. G.; Greiner, M. T.; Wang, Z. B.; Lu, Z. H. (2010). "Pitfalls in measuring work function using photoelectron spectroscopy". Applied Surface Science. 256 (8): 2602. Bibcode:2010ApSS..256.2602H. doi:10.1016/j.apsusc.2009.11.002.
Nikolic, M. V.; Radic, S. M.; Minic, V.; Ristic, M. M. (February 1996). "The dependence of the work function of rare earth metals on their electron structure". Microelectronics Journal. 27 (1): 93–96. doi:10.1016/0026-2692(95)00097-6. ISSN0026-2692.