Richardson, Vincent, Costello, John T. ORCID: 0000-0003-4677-9999, Cubaynes, D., Düsterer, S., Feldhaus, J., van der Hart, H., Juranić, P., Li, Wei B., Meyer, M., Richter, M., Sorokin, A.A. and Tiedke, K. (2010) Two-photon inner-shell ionization in the extreme ultraviolet. Physical Review Letters, 105 (1). 013001-1. ISSN 0031-9007