@article{1103841220, author = {Hellwig, K.-E. and Kraus, K.}, title = {Pure operations and measurements}, journal = {Comm. Math. Phys.}, volume = {7}, number = {1}, year = {1968}, pages = { 214-220}, language = {en}, url = {http://dml.mathdoc.fr/item/1103841220} }
Hellwig, K.-E.; Kraus, K. Pure operations and measurements. Comm. Math. Phys., Tome 7 (1968) no. 1, pp. 214-220. http://gdmltest.u-ga.fr/item/1103841220/