@article{RSMUP_1987__78__1_0,
     author = {Diomeda, Lorenza and Lisena, Benedetta},
     title = {Propagation, reflection and refraction of singularities for a hyperbolic transmission problem in two adjacent angular regions},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {1--26},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {78},
     year = {1987},
     mrnumber = {934506},
     zbl = {0648.35087},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1987__78__1_0/}
}