Voir la notice de l'article provenant de la source Math-Net.Ru
@article{CHFMJ_2021_6_4_a1, author = {F.T. Bogatyreva}, title = {Boundary value problems for a first order}, journal = {\v{C}el\^abinskij fiziko-matemati\v{c}eskij \v{z}urnal}, pages = {403--416}, publisher = {mathdoc}, volume = {6}, number = {4}, year = {2021}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/CHFMJ_2021_6_4_a1/} }
F.T. Bogatyreva. Boundary value problems for a first order. Čelâbinskij fiziko-matematičeskij žurnal, Tome 6 (2021) no. 4, pp. 403-416. http://geodesic.mathdoc.fr/item/CHFMJ_2021_6_4_a1/