Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1993_29_2_a11, author = {T. I. Kiguradze}, title = {Periodic boundary value problems for linear hyperbolic equations. {I}}, journal = {Differencialʹnye uravneni\^a}, pages = {281--297}, publisher = {mathdoc}, volume = {29}, number = {2}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1993_29_2_a11/} }
T. I. Kiguradze. Periodic boundary value problems for linear hyperbolic equations. I. Differencialʹnye uravneniâ, Tome 29 (1993) no. 2, pp. 281-297. http://geodesic.mathdoc.fr/item/DE_1993_29_2_a11/