@article{TRSPY_2015_291_a1,
     author = {E. R. Avakov},
     title = {Stability theorem and extremum conditions for abnormal problems},
     journal = {Informatics and Automation},
     pages = {10--29},
     year = {2015},
     volume = {291},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2015_291_a1/}
}