@article{article, title  = {{Evidence for population inversion in excited electron states of a double barrier resonant tunneling structure}},

 publisher = {{AIP Publishing}},

 url = {{}},

 year = {{1994}},

 month = {{5}},

 author = {{Cockburn JW and Skolnick MS and Whittaker DM and Buckle PD and Willcox ARK and Smith GW}},

 doi = {{10.1063/1.111627}},

 volume = {{64}},

 journal = {{Applied Physics Letters}},

 issue = {{18}},

 pages = {{2400-2402}},

 note = {{Accessed on 2025/04/22}}}