@article{ZNSL_1997_246_a2,
     author = {V. A. Zalgaller},
     title = {A representation of functions of several variables as the difference of convex functions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {36--65},
     year = {1997},
     volume = {246},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1997_246_a2/}
}