@article{RSMUP_1993__90__189_0,
     author = {Luterotti, Fabio},
     title = {Some results on weak solutions to a class of singular hyperbolic variational inequalities},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {189--205},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {90},
     year = {1993},
     mrnumber = {1257139},
     zbl = {0833.35097},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1993__90__189_0/}
}