@article{ASNSP_1979_4_6_4_719_0,
     author = {Papi Frosali, Gloria},
     title = {On the stability of the {Dirichlet} problem for the vibrating string equation},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {719--728},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 6},
     number = {4},
     year = {1979},
     mrnumber = {563341},
     zbl = {0429.35043},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1979_4_6_4_719_0/}
}