Media type: E-Article Title: On the calculation of normally ordered correlation functions for the electromagnetic field by means of the Q(β)-function Contributor: Graham, R.; Haake, F. Published: Elsevier BV, 1968 Published in: Physics Letters A, 26 (1968) 8, Seite 385-386 Language: English DOI: 10.1016/0375-9601(68)90389-7 ISSN: 0375-9601 Keywords: General Physics and Astronomy Origination: Footnote: