Burtsev S V

Publications in Math-Net.Ru

1. Theorems on the existence of an implicit function in the theory of necessary and sufficient conditions for an extremum
   
   Mat. Sb., 185:5 (1994),  79–102
2. Two implicit function theorems
   
   Uspekhi Mat. Nauk, 46:3(279) (1991),  183–184