@article{VSGTU_2024_28_4_a0,
     author = {V. N. Nefedov},
     title = {Some necessary and some sufficient conditions for local extrema of polynomials and power series in two variables},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {615--650},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {2024},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2024_28_4_a0/}
}