Simic-Milosevic, V., Heyde, M., Nilius, N., Nowicki, M., Rust, H.-P., & Freund, H.-J. (2007). Substrate-mediated interaction and electron-induced diffusion of single lithium atoms on Ag(001). Physical Review B, 75(19): 195416. doi:10.1103/PhysRevB.75.195416.