@article{MM2_1993__79_1_155850,
     author = {Juan Carlos D{\'\i}az},
     title = {Two problems of valdivia on distinguished {Frechet} spaces.},
     journal = {Manuscripta mathematica},
     pages = {403--410},
     publisher = {mathdoc},
     volume = {79},
     number = {1},
     year = {1993},
     zbl = {0799.46003},
     url = {http://geodesic.mathdoc.fr/item/MM2_1993__79_1_155850/}
}