Spemann, D., Reinert, T., Vogt, J., Butz, T., Otte, K., & Zimmer, K. (2001). Novel
test sample for submicron ion-beam analysis. Nuclear Instruments and Methods in Physics Research Section
B: Beam Interactions with Materials and Atoms, 181(1-4), 186-192. doi:10.1016/S0168-583X(01)00362-7.