Albrecht, Ernst ; Ricker, Werner J.: Local spectral theory for operators with thin spectrum. In: Gheondea, Aurelian ; Şabac, Mihai: Spectral Analysis and Its Applications : Ion Colojoară Anniversary. -
Bucharest : Theta, 2003. - S. 1-25. - (Theta series in advanced mathematics ; 2)
ISBN 973-85432-3-1
(Begutachteter Beitrag / peer-reviewed paper)