An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Beige A, Hegerfeldt GC.Beige A, et al. Among authors: hegerfeldt gc.Phys Rev A. 1996 Jan;53(1):53-65. doi: 10.1103/physreva.53.53.Phys Rev A. 1996.PMID: 9912860No abstract available.
Hegerfeldt GC, Henneberg R.Hegerfeldt GC, et al.Phys Rev A. 1990 Jan 15;41(2):1161-1164. doi: 10.1103/physreva.41.1161.Phys Rev A. 1990.PMID: 9903203No abstract available.
Hegerfeldt GC, Vogt AW.Hegerfeldt GC, et al.Phys Rev A. 1990 Mar 1;41(5):2610-2613. doi: 10.1103/physreva.41.2610.Phys Rev A. 1990.PMID: 9903393No abstract available.