@article{article808d1aa5, title = {Nonlinear wave-mixing processes in the extreme ultraviolet}, author = {Misoguti, Lino and Christov, I. P. and Backus, S. and Murnane, M. M. and Kapteyn, H. C.}, year = {2005}, doi = {10.1103/physreva.72.063803}, journal = {Physical Review A} }