Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_1994_8_2-3_a8, author = {Svetla Spirova}, title = {On a {Boundary,} {Value} {Problem} for an {Equation} of {Mixed} {Type}}, journal = {Mathematica balkanica}, pages = {221}, publisher = {mathdoc}, volume = {8}, number = {2-3}, year = {1994}, url = {http://geodesic.mathdoc.fr/item/MABA_1994_8_2-3_a8/} }
Svetla Spirova. On a Boundary, Value Problem for an Equation of Mixed Type. Mathematica balkanica, Tome 8 (1994) no. 2-3, p. 221. http://geodesic.mathdoc.fr/item/MABA_1994_8_2-3_a8/