@article{TIMB_2009_17_2_a3,
     author = {A. V. Krivko-Krasko},
     title = {The conditions of a local minimum of a function in two variable at boundary points},
     journal = {Trudy Instituta matematiki},
     pages = {35--44},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMB_2009_17_2_a3/}
}