@article{10_21136_CMJ_1988_102256,
     author = {John, Kamil},
     title = {Operators whose tensor powers are $\varepsilon$-$\pi$-continuous},
     journal = {Czechoslovak Mathematical Journal},
     pages = {602--610},
     publisher = {mathdoc},
     volume = {38},
     number = {4},
     year = {1988},
     doi = {10.21136/CMJ.1988.102256},
     mrnumber = {962904},
     zbl = {0695.47015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1988.102256/}
}