@article{TRSPY_2018_301_a8,
     author = {N. B. Il'in and A. N. Pechen},
     title = {Conditions for the absence of local extrema in problems of quantum coherent control},
     journal = {Informatics and Automation},
     pages = {119--123},
     publisher = {mathdoc},
     volume = {301},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2018_301_a8/}
}