Schopper, Herwig (14 March 1957). "Circular polarisation of gamma-rays: Further proof for parity failure in beta decay". Philosophical Magazine. 2 (17): 710–713. Bibcode:1957PMag....2..710S. doi:10.1080/14786435708242717.
Clausnitzer, G.; Fleischmann, R.; Schopper, H. (August 1956). "Erzeugung eines Wasserstoffatomstrahles mit gleichgerichteten Kernspins". Zeitschrift für Physik. 144 (4): 336–342. Bibcode:1956ZPhy..144..336C. doi:10.1007/BF01340806. S2CID120961803.
Engler, J.; Horn, K.; Mönnig, F.; Schludecker, P.; Schmidt-Parzefall, W.; Schopper, H.; Sievers, P.; Ullrich, H.; Hartung, R.; Runge, K.; Galaktionov, Yu (11 May 1970). "Neutron-proton total cross-sections between 8 GeVc and 21 GeVc". Physics Letters B. 31 (10): 669–672. Bibcode:1970PhLB...31..669E. doi:10.1016/0370-2693(70)90031-6.
Engler, J.; Flauger, W.; Gibbard, B.; Mönnig, F.; Runge, K.; Schopper, H. (1 January 1973). "A total absorption spectrometer for energy measurements of high-energy particles". Nuclear Instruments and Methods. 106 (1): 189–200. Bibcode:1973NucIM.106..189E. doi:10.1016/0029-554x(73)90063-3.
Schopper, Herwig (2009). "What Have We Learned from LEP? – Physics Results". LEP The Lord of the Collider Rings at CERN 1980-2000: What Have We Learned from LEP? - Physics Results. Geneva, Switzerland: Springer. pp. 113–142. doi:10.1007/978-3-540-89301-1_8. ISBN978-3-540-89300-4.
Schopper, Herwig (2009). "The Approval, or How to Persuade Governments". LEP The Lord of the Collider Rings at CERN 1980-2000: The Approval, or How to Persuade Governments. Geneva, Switzerland: Springer. pp. 19–30. doi:10.1007/978-3-540-89301-1_3. ISBN978-3-540-89300-4.
Schopper, Herwig (14 March 1957). "Circular polarisation of gamma-rays: Further proof for parity failure in beta decay". Philosophical Magazine. 2 (17): 710–713. Bibcode:1957PMag....2..710S. doi:10.1080/14786435708242717.
Clausnitzer, G.; Fleischmann, R.; Schopper, H. (August 1956). "Erzeugung eines Wasserstoffatomstrahles mit gleichgerichteten Kernspins". Zeitschrift für Physik. 144 (4): 336–342. Bibcode:1956ZPhy..144..336C. doi:10.1007/BF01340806. S2CID120961803.
Engler, J.; Horn, K.; Mönnig, F.; Schludecker, P.; Schmidt-Parzefall, W.; Schopper, H.; Sievers, P.; Ullrich, H.; Hartung, R.; Runge, K.; Galaktionov, Yu (11 May 1970). "Neutron-proton total cross-sections between 8 GeVc and 21 GeVc". Physics Letters B. 31 (10): 669–672. Bibcode:1970PhLB...31..669E. doi:10.1016/0370-2693(70)90031-6.
Engler, J.; Flauger, W.; Gibbard, B.; Mönnig, F.; Runge, K.; Schopper, H. (1 January 1973). "A total absorption spectrometer for energy measurements of high-energy particles". Nuclear Instruments and Methods. 106 (1): 189–200. Bibcode:1973NucIM.106..189E. doi:10.1016/0029-554x(73)90063-3.