Werf, D. v. d., Charlton, M., Giles, T., Lewis, H., & Werf, D. P. v. d. (2013). Positron annihilation in small molecules. Journal of Physics B: Atomic, Molecular and Optical Physics, 46(19), p. 195001. doi:10.1088/0953-4075/46/19/195001

Werf, Dirk van der, M. Charlton, T. Giles, H. Lewis, and D P van der Werf. "Positron Annihilation in Small Molecules." Journal of Physics B: Atomic, Molecular and Optical Physics 46, no. 19 (2013): 195001.

Werf, Dirk van der, et al. "Positron Annihilation in Small Molecules." Journal of Physics B: Atomic, Molecular and Optical Physics 46.19 (2013): 195001.