@article{IIGUM_2022_41_a1,
     author = {Vladimir A. Dykhta},
     title = {Feedback minimum principle: variational strengthening of the concept of extremality in optimal control},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {19--39},
     publisher = {mathdoc},
     volume = {41},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2022_41_a1/}
}