Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1967_1_2_a6, author = {V. A. Sadovnichii}, title = {Trace formulae for ordinary differential operators of higher orders}, journal = {Matemati\v{c}eskie zametki}, pages = {179--188}, publisher = {mathdoc}, volume = {1}, number = {2}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1967_1_2_a6/} }
V. A. Sadovnichii. Trace formulae for ordinary differential operators of higher orders. Matematičeskie zametki, Tome 1 (1967) no. 2, pp. 179-188. http://geodesic.mathdoc.fr/item/MZM_1967_1_2_a6/