@article{PORMA_1970__29_4_115129,
     author = {Istratescu, V. and Istratescu, I.},
     title = {On bare and semibare points for some classes of operators},
     journal = {Portugaliae mathematica},
     pages = {205--211},
     publisher = {mathdoc},
     volume = {29},
     number = {4},
     year = {1970},
     mrnumber = {0288608},
     zbl = {0218.47003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1970__29_4_115129/}
}