Werf, D. v. d., Werf, D. v. d., Jørgensen, L., Watson, T., Charlton, M., Collier, M., . . . Funakoshi, R. (2002). The ATHENA positron accumulator. Applied Surface Science, 194(1-4), pp. 312-316. doi:10.1016/S0169-4332(02)00141-1

Werf, Dirk van der, D.P van der Werf, L.V Jørgensen, T.L Watson, M. Charlton, M.J.T Collier, M. Doser, and R. Funakoshi. "The ATHENA Positron Accumulator." Applied Surface Science 194, no. 1-4 (2002): 312-316.

Werf, Dirk van der, et al. "The ATHENA Positron Accumulator." Applied Surface Science 194.1-4 (2002): 312-316.