Fortschritte der Physik / Progress of Physics, 2002, v. 50, n. 10/11, p. 1126, doi. 10.1002/1521-3978(200210)50:10/11<1126::AID-PROP1126>3.0.CO;2-B
Fortschritte der Physik / Progress of Physics, 2002, v. 50, n. 10/11, p. 1001, doi. 10.1002/1521-3978(200210)50:10/11<1001::AID-PROP1001>3.0.CO;2-E