@article{AIHPC_1990__7_6_505_0, author = {Tsuji, Mikio}, title = {Prolongation of classical solutions and singularities of generalized solutions}, journal = {Annales de l'I.H.P. Analyse non lin\'eaire}, pages = {505--523}, publisher = {Gauthier-Villars}, volume = {7}, number = {6}, year = {1990}, mrnumber = {1079570}, zbl = {0722.35025}, language = {en}, url = {http://www.numdam.org/item/AIHPC_1990__7_6_505_0/} }