@article{TIMM_2022_28_1_a9,
     author = {L. F. Korkina and M. A. Rekant},
     title = {On the product of operator exponentials},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {156--163},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2022_28_1_a9/}
}