@article{KUIPM_1992_a5,
     author = {A. I. Korablev and V. V. \`Eisman},
     title = {A general method for finding the direction of descent in $\varepsilon$-subgradient methods},
     journal = {Issledovaniya po Prikladnoi Matematike i Informatike},
     pages = {50--58},
     publisher = {mathdoc},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUIPM_1992_a5/}
}