Media type: E-Article Title: Two distinct perspectives on the formalism of operations and effects Contributor: d’Espagnat, Bernard Published: American Physical Society (APS), 1988 Published in: Physical Review A, 38 (1988) 10, Seite 5450-5452 Language: English DOI: 10.1103/physreva.38.5450 ISSN: 0556-2791 Origination: Footnote: