@article{RSMUP_1995__94__165_0,
     author = {Manfrin, Renato},
     title = {Some results of {Gevrey} and analytic regularity for semilinear weakly hyperbolic equations of {Oleinik} type},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {165--213},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {94},
     year = {1995},
     mrnumber = {1370911},
     zbl = {0878.35076},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1995__94__165_0/}
}