@article{VSPUI_2011_3_a7,
     author = {L. N. Polyakova},
     title = {The hypodifferential and the $\varepsilon$-subdifferential of polyhedral function},
     journal = {Vestnik Sankt-Peterburgskogo universiteta. Prikladna\^a matematika, informatika, processy upravleni\^a},
     pages = {64--71},
     year = {2011},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSPUI_2011_3_a7/}
}