@article{PhysRevFocus.3.33, title = {Selecting Excited States}, author = {Anonymous}, journal = {Phys. Rev. Focus}, volume = {3}, issue = {}, pages = {33}, numpages = {1}, year = {1999}, month = {Jun}, doi = {10.1103/PhysRevFocus.3.33}, url = {http://link.aps.org/doi/10.1103/PhysRevFocus.3.33}, publisher = {American Physical Society} }