@article{FPM_2014_19_5_a7,
     author = {E. S. Polovinkin},
     title = {Subdifferentials for the difference of two convex functions},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {167--184},
     publisher = {mathdoc},
     volume = {19},
     number = {5},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2014_19_5_a7/}
}