@article{RLINA_1968_8_45_3-4_a3,
     author = {Barbu, Viorel},
     title = {On regularity of weak solutions of abstract differential equations in {Hilbert} spaces},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali},
     pages = {129--134},
     publisher = {mathdoc},
     volume = {Ser. 8, 45},
     number = {3-4},
     year = {1968},
     zbl = {0169.18802},
     mrnumber = {0261130},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RLINA_1968_8_45_3-4_a3/}
}